Bibliografías temáticas / Contact lenses

Literatura académica sobre el tema "Contact lenses"

Autor: Grafiati
Publicado: 4 de junio de 2021
Última modificación: 28 de julio de 2024

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Artículos de revistas sobre el tema "Contact lenses"

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Re, Sarasyita Nada, Ari Udijono, Arie Wuryanto y Henry Setyawan. "Faktor- Faktor Yang Berhubungan Dengan Praktik Penggunaan Lensa Kontak Dalam Pencegahan Komplikasi Gangguan Kesehatan Mata Pada Mahasiswa Universitas Diponegoro". MEDIA KESEHATAN MASYARAKAT INDONESIA 19, n.º 1 (9 de enero de 2020): 57–61. http://dx.doi.org/10.14710/mkmi.19.1.57-61.

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Latar belakang: Lensa kontak merupakan alternatif pengganti kacamata untuk mengkoreksi gangguan refraksi mata. Di zaman modern, lensa kontak menjadi tren tersendiri, dan penggunanya terus meningkat. Penting untuk memahami faktor-faktor yang berhubungan dengan penggunaan lensa kontak, karena selain memiliki berbagai macam kelebihan, lensa kontak juga memiliki dampak negatif bagi penggunanya. Tujuan: penelitian ini untuk menganalisis faktor-faktor yang berhubungan dengan praktik penggunaan lensa kontak dalam pencegahan komplikasi gangguan kesehatan mata pada mahasiswa Universitas Diponegoro.Metode: Metode yang digunakan yaitu kuantitatif dengan pendekatan cross sectional. Populasi pada penelitian ini yaitu mahasiswa Universitas Diponegoro dan sampel sebanyak 60 orang responden sebagai kelompok pengguna lensa kontak dan 60 orang responden sebagai kelompok bukan pengguna lensa kontak dengan teknik sampling consecutive sampling. Analisis data dilakukan secara univariat dan bivariat dengan uji statistik chi square (taraf kemaknaan 0,05).Hasil: Faktor yang berhubungan dengan praktik penggunaan lensa kontak pada mahasiswa Universitas Diponegoro, yaitu jenis kelamin (p=0,0001), lensa kontak untuk koreksi kelainan refraksi (p= 0,0001), lensa kontak untuk kosmetik (p= 0,0001), orang yang mempengaruhi untuk menggunakan lensa kontak (p= 0,008), penggunaan lensa kontak karena tren (p= 0,0001), tempat pembelian lensa kontak (p= 0,0001), penggunaan lensa kontak karena penjualannya bebas (p= 0,0001), persepsi manfaat lensa kontaksebagai pengganti kacamata (p= 0,003), persepsi manfaat lensa kontak dapat meningkatkan citra diri (p= 0,042).Simpulan: Jenis kelamin, lensa kontak untuk koreksi gangguan refraksi, lensa kontak untuk kosmetik, orang yang mempengaruhi untuk menggunakan lensa kontak, penggunaan lensa kontak karena tren, tempat pembelian lensa kontak, penggunaan lensa kontak karena penjualannya bebas, persepsi manfaat lensa kontaksebagai pengganti kacamata, persepsi manfaat lensa kontak dapat meningkatkan citra diri. Kata kunci: Lensa kontak, Praktik, Universitas Diponegoro Title: Factors Related to the Practice of Using Contact Lenses in the Prevention of Complications of Eye Health Disorders in Diponegoro University Students Background: Contact lenses are an alternative besides glasses to correct eye refraction disorders. In modern era, contact lenses are becoming a trend, and the users are increase continuously. It is important to understand the factors associated with the use of contact lenses, because in addition to having various kinds of advantages, contact lenses also have a negative impact on users. Objective: this study is to analyze the factors associated with the practice of contact lens use in prevention of eye health disorders complications at Diponegoro University students. Method: The study design is quantitative with cross sectional approach. The population in this study were Diponegoro University students and a sample of 60 respondents as a contact lens’s user group and 60 respondents as a not contact lens’s user group with consecutive sampling technique. Data analysis was done by univariate and bivariate with chi square test (significance level of 0.05). Results: Factors related to the practice of contact lens use in Diponegoro University students, gender (p = 0,0001), contact lenses for correction of refraction disorders (p = 0,0001), contact lenses for cosmetics (p = 0,0001 ), people who influence to use contact lenses (p= 0,008), contact lens use due to trends (p = 0,0001), where to buy contact lenses (p = 0,0001), contact lens use because free sales (p = 0,0001), the benefits perception of contact lenses as a substitute for glasses (p = 0.003), the benefits perception of contact lenses can improve self-image (p = 0.042).Conclusion: Gender, contact lenses for correction of refraction disorders, contact lenses for cosmetics, people who influence to use contact lenses, use of contact lenses due to trends, places to buy contact lenses, use of contact lenses because of free sales, benefits perception of contact lenses as a substitute for glasses, the benefits perception of contact lenses can improve self-image. Keywords: Contact lenses, Practice, Diponegoro University
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Bobba, Samantha y Nick Di Girolamo. "Contact Lenses". Optometry and Vision Science 93, n.º 4 (abril de 2016): 412–18. http://dx.doi.org/10.1097/opx.0000000000000699.

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KETT, W. G. "CONTACT LENSES". Australasian Journal of Optometry 14, n.º 3 (25 de marzo de 2010): 4–21. http://dx.doi.org/10.1111/j.1444-0938.1931.tb00047.x.

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Caffery, Barbara. "Contact Lenses". Optometry and Vision Science 77, n.º 2 (febrero de 2000): 65. http://dx.doi.org/10.1097/00006324-200002000-00006.

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Garnett, Brian. "CONTACT LENSES". Optometry and Vision Science 67, n.º 3 (marzo de 1990): 230–31. http://dx.doi.org/10.1097/00006324-199003000-00015.

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Form, Desmond. "CONTACT LENSES". Optometry and Vision Science 73, n.º 5 (mayo de 1996): 360. http://dx.doi.org/10.1097/00006324-199605000-00024.

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Bergenske, Peter D. "Contact Lenses". Optometry and Vision Science 74, n.º 5 (mayo de 1997): 246. http://dx.doi.org/10.1097/00006324-199705000-00016.

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Bergenske, Peter. "Contact Lenses". Optometry and Vision Science 75, n.º 7 (julio de 1998): 467. http://dx.doi.org/10.1097/00006324-199807000-00013.

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Lowther, Gerald E. "CONTACT LENSES". Optometry and Vision Science 62, n.º 1 (enero de 1985): 72. http://dx.doi.org/10.1097/00006324-198501000-00012.

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Aquavella, James V. y Gullapalli N. Rao. "CONTACT LENSES". Optometry and Vision Science 64, n.º 10 (octubre de 1987): 797. http://dx.doi.org/10.1097/00006324-198710000-00014.

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Tesis sobre el tema "Contact lenses"

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Kollbaum, Pete S. "Optical aberrations of contact lenses and eyes corrected with contact lenses". [Bloomington, Ind.] : Indiana University, 2007. http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:dissertation&res_dat=xri:pqdiss&rft_dat=xri:pqdiss:3278221.

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Thesis (Ph.D.)--Indiana University, School of Optometry, 2007.
Source: Dissertation Abstracts International, Volume: 68-09, Section: B, page: 5877. Adviser: Arthur Bradley. Title from dissertation home page (viewed May 9, 2008).
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Utkina, M. S. "Invention of contact lenses". Thesis, Sumy State University, 2014. http://essuir.sumdu.edu.ua/handle/123456789/45609.

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Contact lenses is a great invention which is intended for people with a sight problem. They have changed the lives of millions of people around the world. It was estimated that 125 million people (2%) used contact lenses in 2004. A contact lens is a thin lens placed directly on the surface of the eye and it is considered a medical device and may be worn to correct vision or for cosmetic or therapeutic reasons. They might seem like a new, modern invention, but the idea has actually been around for hundreds of years. So, the history of contact lenses development is long and rich.
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Chernenko, S. O. "Virtual reality contact lenses". Thesis, Сумський державний університет, 2012. http://essuir.sumdu.edu.ua/handle/123456789/28515.

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Cardall, Martin. "Contact lenses and sport". Thesis, Aston University, 2008. http://publications.aston.ac.uk/14644/.

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Contact lenses seem to be the ideal method of vision correction for ametropic people who participate in sporting activities. This thesis sets out to evaluate the viewpoint of the optometric professional and that of the patient on the use of contact lenses in sport and to establish if education is needed within this area. It also aims to provide some scientific evidence on the effect of exercise on the physiology of the cornea with and without contact lenses. Silicone hydrogel contact lenses have previously been suggested to impede heat dissipation from the cornea compared to mid water hydrogels. This was further demonstrated with exercise. The physiological integrity of the cornea is dependant on the amount of oxygen available to its surfaces. Contact lenses can disrupt the diffusion of oxygen to the cornea. Previous methods of measuring the oxygen consumption of the cornea have been limited by their invasive nature and assessment of only a small surface area of the cornea. They are not suitable to measure corneal oxygen consumption during exercise with and without contact lenses. A new method needed to be established. This was achieved by designing a novel method by the use of an oxygen sensor inside an airtight goggle using dynamic quenching of luminescence method. This established a non-contact way of measuring the effect oxygen uptake with and without contact lenses in vivo, allowing the contact lens to be undisturbed in their natural environment. The new method differentiated between the closed-eye and the open-eye condition with a good within-visit repeatability. It also illustrated that the cornea utilises oxygen at a faster rate during controlled aerobic exercise at moderate intensity. New contact lenses are available specifically for sport, these claim to reduce glare and increase contrast for daylight outdoor sports. However, visual benefits of these types of contact lenses cannot be measured easily in an indoor clinical environment, such as the optometric practice. To demonstrate any potential benefits of these lenses emulation of them should be conducted outdoors.
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Lorentz, Holly. "Lipid Deposition on Hydrogel Contact Lenses". Thesis, University of Waterloo, 2006. http://hdl.handle.net/10012/2963.

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The primary objective of this study was to quantify and characterise lipid deposition on soft (hydrogel) contact lenses, particularly those containing siloxane components. Studies involving a variety of in vitro doping and in vivo worn contact lenses were undertaken, in which lipid deposition was analyzed by either TLC or HPLC. Specific experiments were completed to optimize a method to extract the lipid from the lens materials, to compare the total lipid deposition on nine different hydrogel lenses and to analyze the effect that lipid deposition had on wettability. A method for extracting lipid from contact lenses using 2:1 chloroform: methanol was developed. This study also showed that siloxane-containing contact lens materials differ in the degree to which they deposit lipid, which is dependent upon their chemical composition. Small differences in lipid deposition that occur due to using variations in cleaning regimens were not identifiable through TLC, and required more sophisticated analysis using HPLC. Contact lens material wettability was found to be influenced by in vitro lipid deposition. Specifically, conventional hydrogels and plasma surface-treated silicone-hydrogel materials experienced enhanced wettability with lipid deposition. Reverse-phase HPLC techniques were able to quantify lipid deposits with increased sensitivity and accuracy. From the HPLC studies it was found that contact lens material, concentration of the lipid doping solution, and the composition of the lipid doping solution in in vitro deposition studies influenced the ultimate amount and composition of lipid deposits. In vivo HPLC studies showed that the final lipid deposition pattern was influenced by the interaction between the composition of the tear film and the various silicone hydrogel contact lens materials. In conclusion, HPLC analysis methods were more sensitive and quantitative than TLC. Lipid deposition was ultimately influenced by the concentration and composition of the lipid in the tear film and the contact lens material. Contact lens wettability was influenced by the presence and deposition of lipid onto the contact lens surfaces. Finally, this reverse-phase HPLC lipid analysis protocol was not the most sensitive, robust, or accurate. In the future, other methods of analysis should be explored.
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McBriar, D. I. "The plasma treatment of contact lenses". Thesis, Durham University, 1990. http://etheses.dur.ac.uk/6292/.

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This thesis investigates the use of low temperature plasmas as a means of improving the surface properties of hard gas permeable contact lenses. It is important that the polymers used for this application should have good optical properties, should allow transport of oxygen to the cornea and be biocompatible, that is they should not stimulate an adverse response in the tissues which they contact. Whilst most patients have no problems with current materials there are a significant number who experience irritation of the eyes and abnormal build up of deposits on the lens surface. It has been found that mild oxygen plasma treatment of the contact lens can be helpful in alleviating these problems. In this volume the effects of such treatment are examined by x-ray photoelectron spectroscopy and alternative treatments proposed. It is found that the oxygen plasma treatment increases the wettability of the lens surface by the incorporation of oxygen in the polymer. This effect decays with time but is not wholly lost on prolonged storage. The mechanism of this decay appears to be a migration of oxidized material from the surface and is dependent on the storage conditions. During this decay an anomalous transient increase in hydrophilicity was encountered which can be associated with the temporary return of highly oxidized material to the surface. This effect is observed in other polymers and can be shown to be temperature dependent. The use of plasma polymerization as an alternative treatment was investigated and a number of materials produced with similar surface properties to the oxygen treated lens material. It was hoped that a coating would be generally applicable to a variety of lens materials.*Adsorption studies showed that the oxygen treated material has the property of reversibly adsorbing glycoproteins which may account for its performance in the eye. Some of the plasma polymer coatings gave a similar response.
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Ali, Maryam Byrne Mark E. "Therapeutic contact lenses for comfort molecules". Auburn, Ala., 2007. http://hdl.handle.net/10415/1334.

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Hager, Michele LynnManeca. "A Study of Contact Lens Comfort in Patients Wearing Comfilcon A Soft Contact Lenses Compared to Their Habitual Soft Contact Lenses". The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243711014.

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Giner, Tort Anna. "Optical and visual characterization of multifocal contact lenses and multifocal intraocular lenses". Doctoral thesis, Universitat Politècnica de Catalunya, 2018. http://hdl.handle.net/10803/663449.

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Vision is presented and universally accepted as the most precious of the human senses.lt is structured in three main parts: the optical system {eye), the photo-sensor {eye's retina), and the data processor (brain). If one of them is affected by any disease or dysfunction, vision will be terrible or even nonexistent One of the most common dysfunction is presbyopia.lt i s an age-related disorder that is undergone by all the population s ince their mid-late-40s and it is consists in the loss of the ability to focus near objects (accommodation). A huge number of possible corrections of it can be easily found. On one hand, there are temporary corrections ,as progressive spectacle tenses or multifocal contact tenses. On the other hand, permanent corrections as multifocal i ntraocular lenses, multifocal cornea! ablation, accommodating intraocular tenses, monovision systems, or scleral modifications are also applied to correct presbyopia. Another age-related dysfunction is cataract. Cataract is the opacification of the crystalline fens and decreases the quality of the visual function. Consequently, it is one of the leading visual impairments in adults over 60 years old, affecting the half of the adults aged between 75-85 years old. The only possible solution far cataract is the extraction of the opacified fibers of the crystalline lens and the replacement of them with an intraocular lens by surgery. Due to the fact that all the patients affected by an age-related cataract are also affected by presbyopia it is totally understandable that a number of patients choose mulltifocal introcular lens to substitute their crystalline tenses .This way, only one surgery is needed to salve both age-related dysfunctions. Usually, young presbyopes choose a temporary correction as a first option to correct presbyopia. Some presbyopia corrections are based on the simultaneous vision principie, as, far example, multifocal contact or intraocular lenses. The optical design of these kind of lenses is very complex. Consequently, It is characterization is also difficult When these lenses were launched into the market, it was only possible to characterize optical quality before the implantation or the adaptation of them (characterization in vitro) and the visual quality after the surgery or the clinical adaptation was performed (characterization) .M. present and thanks to the technological advances, different new commercial instruments that are to perform characterization in vivo of the visual quality before the implantation or the adaptation of simultaneous vis ion tenses. They are based on the simulation of the vision that these tenses give to the implanted eye. Some experimental prototypes and commercial aberrometers or double­ pass systems have used to perform an optical quality characterization in vivo, but some issues have been reported. Taking into account all this information, the main goal of this thesis is the design and the assembly of a new open-field double-pass system with asymmetric focus that is suitable to characterize invivo optical quality in patients implanted or adapted with multifocal intraocular or contact lenses. In order to achieve this aim, different studies and processes were carried out Review of presbyopia corrections and the characterization of them (Clinical study about objective over-refraction wearing multifocal contact lenses); Verification of the suitability of one commerciat simulator (Clinical study with the commercial simulator VirtlOL (10lens S.l.)); Design and assembly of the double-pass system with asymmetric focus (Opto-mechanical design/ Validation of all the elements included in the system/ Optical validation of the system); Programming of the softwares to manage the system; Validation of the new prototype (Two clinical studies characterizing eyes implanted with multifocal introcular tenses by using the new system were done).
La visió és entesa i, universalment acceptada, com el sentit humà més valorat .Aquesta esta estructurada en tres parts principals: el sistema òptic (l'ull), el fot-sensor (la retina ocular) iel processador (el cervell). Si una d'aquestes parts es veu afectada per una disfunció o malaltia, la visió pot arribar a ser de molt baixa qualitat i, fins hi tot, inexistent Una de les disfuncions més comunes és la presbícia. La presbícia és una disfunció lligada a l'edat que pateix tota lla població a partir dels 40 anys, aproximadament. Consisteix en la pèrdua de la capacitat d'enfocar objectes propers (acomodació). Actualment, es troba un ampli nombre de possibles correccions. Per una banda, tenim les correccions temporals, com ulleres o lents de contacte progressives, i, per l'altre, correccions permanents, com lents intraoculars multifocals , ablacions corneals multifocals, lents intraoculars acomodatives, sistemes de monovisió, o modificacions esclerals, entre altres. Una altre disfunció associada a l'edat és la cataracta, la qual crea la opacificació del cristal·lí impedint una visió nítida. Conseqüentment, la cataracta és una de la deficiències visuals més estesa a partir dels 60 anys, afectant a la meitat de la població entre els 75 i els 85 anys . La única solució per eliminar les cataractes és eliminant les fibres opacificades i substituir-les per una lent intraocular quirúrgicament. Donat que tots els pacients amb cataractes són, a la vegada, prèsbites, està justificat que un nombre de pacients decideixi implantar-se lents intraoculars multifocals per substituir el seu cristal·lí. D'aquesta manera es solucionen dues degeneracions associades a l'edat en una sola cirurgia. Els joves prèsbites acostumen a optar per correccions prèsbites temporals, mentre que molts dels prèsbites amb cataractes opten per solucions permanents. Algunes de les correccions de la presbícia, com les lents de contacte o intraoculars multifocals , estan basades en el principi de visió simultània. Els dissenys òptics d'aquest tipus de lents són molt complexos, cosa que fa que la seva caracterització sigui molt complicada. Quan aquestes lents van aparèixer al mercat, només era possible caracteritzar-les òpticament abans de la seva implantació o adaptació de manera in vitro, i de caracteritzar-les visualment després de la seva adaptació o implantació de manera in vivo. Actualment, i gracies a tots els avenços tecnològics, diferents instruments clínics han estat desenvolupats per realitzar mesures de les qualitats visuals abans de la seva implantació. Tots ells, es basen en simular-li al pacient la visió que tindria després de ser implantat. Per un altre cantó, alguns prototips experimentals iaberrometres o sistemes de doble-pas comercials han estat utilitzats per dur a terme la caracterització de la qualitat in vim en pacients implantats o adaptats amb sistemes multifocals, pero diferents problemes han estat plantejats. Tenint en compte tota aquesta informació, el principal objectiu d'aquesta tesi ha estat la de dissenyar i muntar un nou sistema de doble-pas d'enfocament asimètric de camp obert que fos capaç de fer una caracterització de la qualitat òptica in vivo de pacients implantats o adaptats amb lents de contacte o intraoculars multifocals. I per arribar a aquest objectiu, s'han dut a terme els següents passos: Revisió de les correccions per a la presbícia i caracterització d'elles (Estudi clínic de la sobre-refracció objectiva de pacients adaptats amb lents de contacte multifocals); Validació de la capacitat de mesura d'un simulador comercial (Estudi clínic amb el simulador comercial VirtlOL (1OLens S.L); Disseny i muntatge del sistema de doble-pas amb enfocament asimètric (Disseny opto-mecànic/ Validació de tots els components del sistema/ Validació òptica del sistema); Programació dels programes informàtics que gestionen el sistema i processen
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Saunders, B. D. "The optical performance of bifocal contact lenses". Thesis, University of Manchester, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.254463.

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Libros sobre el tema "Contact lenses"

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Publications, Market Assessment, ed. Contact lenses. [London]: Market Assessment, 1988.

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J, Phillips Anthony y Speedwell Lynne, eds. Contact lenses. 4a ed. Oxford [England]: Butterworth-Heinemann, 1997.

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V, Aquavella James y Rao Gullapalli N, eds. Contact lenses. Philadelphia: Lippincott, 1987.

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Rakow, Phyllis L. Contact lenses. Thorofare, N.J: Slack Inc., 1988.

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Mandell, Robert B. Contact lenspractice. 4a ed. Springfield, Ill., U.S.A: Thomas, 1988.

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Montague, Ruben y Guillon Michel, eds. Contact lens practice. London, UK: Chapman & Hall, 1994.

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Ruben, Montague. Contact lenses: Medical aspects. Singapore: P G Publishing, 1989.

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Wilson, Michael S. Contact lenses in ophthalmology. London: Butterworths, 1988.

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Bennett, Arthur G. Optics of contact lenses. 5a ed. London: Association of Dispensing Opticians, 1985.

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W, Millis Elisabeth A., ed. Contact lenses in ophthalmology. Boston: Butterworths, 1989.

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Capítulos de libros sobre el tema "Contact lenses"

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Bonnet, Mireille. "Contact Lenses". En Microsurgery of Retinal Detachment, 31–32. Berlin, Heidelberg: Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-08731-2_6.

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Galloway, N. R. "Contact Lenses". En Common Eye Diseases and their Management, 95–97. London: Springer London, 1985. http://dx.doi.org/10.1007/978-1-4471-3521-0_9.

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Galloway, Nicholas Robert y Winfried Mawutor Kwaku Amoaku. "Contact Lenses". En Common Eye Diseases and their Management, 67–68. London: Springer London, 1999. http://dx.doi.org/10.1007/978-1-4471-3625-5_10.

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Galloway, Nicholas R., Winfried M. K. Amoaku, Peter H. Galloway y Andrew C. Browning. "Contact Lenses". En Common Eye Diseases and their Management, 83–85. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-32869-0_10.

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Cox, Ian. "Contact lenses". En Handbook of Visual Optics, 187–200. Names: Artal, Pablo, editor. Title: Handbook of visual optics / [edited by] Pablo Artal. Description: Boca Raton : Taylor & Francis, [2017]: CRC Press, 2017. http://dx.doi.org/10.1201/9781315373027-11.

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Galloway, Nicholas R., Winfried M. K. Amoaku, Peter H. Galloway y Andrew C. Browning. "Contact Lenses". En Common Eye Diseases and their Management, 85–87. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-031-08450-8_10.

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McMahon, Timothy T. "Contact Lenses". En Albert and Jakobiec's Principles and Practice of Ophthalmology, 1–14. Cham: Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-319-90495-5_238-1.

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McMahon, Timothy T. "Contact Lenses". En Albert and Jakobiec's Principles and Practice of Ophthalmology, 1023–35. Cham: Springer International Publishing, 2022. http://dx.doi.org/10.1007/978-3-030-42634-7_238.

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Ford, Wendy M. "Contact Lenses". En Principles and Practice in Ophthalmic Assisting, 379–416. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003525899-24.

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Ledford, Janice K. "Contact Lenses". En Certified Ophthalmic Assistant Exam Review Manual, 23–38. 3a ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522942-3.

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Actas de conferencias sobre el tema "Contact lenses"

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Koike, Yasuhiro. "Eye Contact GRIN Lenses". En Gradient-Index Optical Imaging Systems. Washington, D.C.: Optica Publishing Group, 1994. http://dx.doi.org/10.1364/giois.1994.gwb1.

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Additional design by controlling the radial graded-index (GRIN) inside a lens medium has generated considerable interest especially in reducing spherical aberration or increasing optical power. However in the case of glass materials, it is difficult to prepare large dimensional GRIN materials with about 10 mm diameters. On the other hand, polymer materials are suitable for obtaining a large dimension such as 10mm - 100mm1).
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Marcus, Michael A., David Compertore, Donald S. Gibson, Matthew E. Herbrand y Filipp V. Ignatovich. "Multimodal characterization of contact lenses". En SPIE Optifab, editado por Julie L. Bentley y Sebastian Stoebenau. SPIE, 2015. http://dx.doi.org/10.1117/12.2196303.

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Huang, Hsiang-Yu, Chen-Chien Hsu, Yan-Jhang Shi, Man-Wei Huang y Shih-An Li. "Contact lenses try-on system". En 2014 IEEE International Conference on Consumer Electronics - Taiwan (ICCE-TW). IEEE, 2014. http://dx.doi.org/10.1109/icce-tw.2014.6904023.

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Wiemer, Mike y Renaldi Winoto. "Mojo Lens - AR Contact Lenses for Real People". En 2021 IEEE Hot Chips 33 Symposium (HCS). IEEE, 2021. http://dx.doi.org/10.1109/hcs52781.2021.9567321.

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Baude, D., G. Obrecht, P. Chavel, D. Joyeux y J. Taboury. "Physical Quality Assessment of Multifocal Contact Lenses to Correct Presbyopia". En Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/ovo.1991.fc2.

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To correct presbyopia with contact lenses, three means exist for a long time: monovision, translating bifocals and simultaneous vision. The main feature of the last one is to produce on the retina, two or more images from a single object, each corresponding to a different optical power. However, only one of these images can be in-focus at one time. The out-of-focus images of an extended object produce a loss of contrast in the in-focus image, with respect to sharp images produced by a spherical lens. So it is necessary to devise specific tools to assess the physical quality of these multifocal contact lenses correcting presbyopia.
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Campbell, Melanie C. W., W. Neil Charman, Linda Voisin y Chengwu Cui. "Psychophysical Measurement of the Optical Quality of Varifocal Contact Lenses". En Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofa.3.

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There are several designs of contact lenses currently available for the correction of presbyopia. No lens comes close to the ideal of providing a correction appropriate to the object of regard which covers the full entrance pupil of the eye1. Of interest are the compromises offered by specific designs and how well their on-eye performance compares with both their theoretical performance and in vitro measurements made on the lenses. One of the current classes of design consists of concentric simultaneous vision varifocal lenses. These lenses are usually limited to radial power profiles. The available range of corrective power under any particular set of lighting conditions is dependent on the pupil diameter of the individual wearer. The lens design usually cannot be modified to match the pupil diameter of the individual nor to increase the effective reading addition for the aging presbyope1. Their smooth variation in power is presumed to give reasonably good visual performance for a wide range of object distances. Moreover, unlike alternating designs, concentric varifocals give adequate near vision for all directions of gaze, and do not require decentration, which is difficult to achieve with soft lenses.
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Williby, Gregory A., Daniel G. Smith, Richard B. Brumfield y John E. Greivenkamp. "Interferometric testing of soft contact lenses". En Optical Science and Technology, SPIE's 48th Annual Meeting, editado por H. Philip Stahl. SPIE, 2004. http://dx.doi.org/10.1117/12.505854.

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Elliott, C. J. "Automatic Optical Measurement Of Contact Lenses". En 1986 International Symposium/Innsbruck, editado por Lionel R. Baker y H. John Caulfield. SPIE, 1986. http://dx.doi.org/10.1117/12.938279.

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Hemenger, Richard P. "Designing Multifocal Contact Lenses and IOL's". En Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofe.7.

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Bullimore, Mark A. y Robert J. Jacobs. "Pupil Size and Visual Performance with Soft Bifocal Contact Lenses". En Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/ovo.1992.thb2.

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There is a growing population of presbyopic contact lens wearers. Many of these individuals would like to retain the comfort, convenience and cosmesis of soft lenses and avoid the use of spectacle lenses to achieve adequate vision at distance and near. This demand has led to the development of a wide range of soft bifocal contact lens (SBCL) designs. The majority rely on "simultaneous- vision" where the in-focus image of the distant or near object formed by the appropriate portion of the lens is always accompanied by a superimposed out-of-focus image formed by the remainder of the lens. Simultaneous-vision may be achieved by various techniques. The traditional approach is the concentric design where a small (~2.5 mm) central near portion is surrounded by the distance portion (e.g. the Alges lens). Alternatively the distance portion may be placed at the lens center (e.g. the Bi-soft lens). A second approach is the aspheric design where a gradual transition in lens power between the distance and near portions is achieved by producing and back or front lens surface (e.g. the PA1 lens). Increases in asphericity will produce a more pronounced variation in surface power, thereby increasing the range of distances over which the lens is focussed but this will be at the expense of image quality (Charman and Walsh, 1988). A third approach is the diffractive design as employed in the Echelon lens (Klein and Ho, 1986). In this lens, images of distance objects are formed by refraction, while images of near objects are formed by diffraction. Diffraction is achieved by annular grooves on the back surface of the lens.
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Informes sobre el tema "Contact lenses"

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Molinari, Joseph F. y James F. Socks. Effects of Hyperbaric Conditions on Corneal Physiology with Hydrogel Contact Lenses. Fort Belvoir, VA: Defense Technical Information Center, octubre de 1987. http://dx.doi.org/10.21236/ada189152.

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Morse, Stephen E. y Melisa A. Reese. The Use of Bifocal Soft Contact Lenses in the Fort Rucker Aviation Environment. Fort Belvoir, VA: Defense Technical Information Center, agosto de 1997. http://dx.doi.org/10.21236/ada329048.

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Bertozzi, Carolyn R. Development and testing of new biologically-based polymers as advanced biocompatible contact lenses. Office of Scientific and Technical Information (OSTI), junio de 2000. http://dx.doi.org/10.2172/775141.

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Bigaud, Mariah A. y Anna Kam-Ha Yeung-Cheung. The in vitro Studies of the Inhibitory Effect of Green Tea (Camellia sinensis) on Pseudomonas aeruginosa Treated Contact Lenses. Journal of Young Investigators, abril de 2017. http://dx.doi.org/10.22186/jyi.32.4.25-29.

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Lattimore, Morris R. Military Aviation: A Contact Lens Review. Fort Belvoir, VA: Defense Technical Information Center, enero de 1991. http://dx.doi.org/10.21236/ada233199.

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Vaidya, S. y R. Andino. Micro-Thin Lens/Bifocal Contact Lens Final Report CRADA No. TC-0331-92-1B. Office of Scientific and Technical Information (OSTI), noviembre de 2017. http://dx.doi.org/10.2172/1408983.

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Vaidya, S. Micro-Thin Lens/Bifocal Contact Lens Final Report CRADA No. TC-0331-92-1B. Office of Scientific and Technical Information (OSTI), junio de 2001. http://dx.doi.org/10.2172/790107.

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Cordella, Tito y Andrew Powell. Preferred and Non-Preferred Creditors. Inter-American Development Bank, marzo de 2021. http://dx.doi.org/10.18235/0003109.

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International financial institutions (IFIs) generally enjoy preferred creditors treatment (PCT). Although PCT rarely appears in legal contracts, when sovereigns restructure bilateral or commercial debts, they normally pay IFIs in full. This paper presents a model where a creditor, such as an IFI, that can commit to lend limited amounts at the risk-free rate and can refrain from lending into arrears is always repaid and adds value. The analysis suggests that IFIs and market lenders can both enhance welfare, even if banning commercial borrowing can sometimes be optimal. To maintain their status, preferred lenders should offer low cost financing in volumes that are consistent with countries' incentives to repay even in bad states. This suggests such lenders should not differentiate lending interest rates according to risk and should not participate in the restructuring of commercial debt.
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Velasco, Andrés y Eduardo A. Cavallo. Quid pro Quo: National Institutions and Sudden Stops in International Capital Movements. Inter-American Development Bank, noviembre de 2006. http://dx.doi.org/10.18235/0010860.

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The paper explores the incidence of sudden stops in capital flows on the incentives for building national institutions that secure property rights in a world where sovereign defaults are possible equilibrium outcomes. Also the paper builds upon the benchmark model of sovereign default and direct creditor sanctions by Obstfeld and Rogoff (1996). In their model it is in the debtor countrys interest to tie its hands and secure the property rights of lenders as much as possible because this enhances the credibility of the countrys romise to repay and prevents default altogether. It incorporate two key features of todays international financial markets that are absent from the benchmark model: the possibility that lenders can trigger sudden stops in capital movements, and debt contracts in which lenders transfer resources to the country at the start of the period, which have to be repaid later. The paper shows that under these conditions the advice build institutions to secure repayment at all costs may be very bad advice indeed.
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Smith, Chloe, Hasnan Bachtiar, Kainat Shakil, Nicholas Morieson y Susan de Groot Heupner. Appealing to a Religiously Defined ‘the People’: How Religion Was Performatively Operationalised in the 2019 and 2024 Election Campaigns of Indonesia’s President-Elect. European Center for Populism Studies (ECPS), abril de 2024. http://dx.doi.org/10.55271/pp0034.

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Observers widely acknowledged the lack of divisive Islamist populism in Indonesia’s 2024 Presidential Elections. This was in stark contrast to the 2019 elections in which Prabowo Subianto, the case study of this article and new leader of Indonesia, led a campaign that overtly supported Islamist interests and actors, and deepened religio-ethnic tensions in society. Despite this acknowledgement, it remains unclear if religion was still operationalized – albeit differently – in his most recent campaigning efforts. This article therefore seeks to examine if religion was politicized and performed by Prabowo in 2024 and contrast the findings with 2019 to address how and why his instrumentalization of religion varied significantly. Applying a discursive-performative lens, discourse analysis will be used to determine if and how religion featured in a sample of Prabowo Subianto’s speeches (six speeches in total, three from each election campaign). Specifically, this analysis will explore how references to religion and a religious community reflect a) his political goals and b) the political community he is attempting to engage. It will also discuss these findings in the context of contemporary populism studies.
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