Bibliografie tematiche / Ophthalmic lenses

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Letteratura scientifica selezionata sul tema "Ophthalmic lenses"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 luglio 2024

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Articoli di riviste sul tema "Ophthalmic lenses"

Maseedupalli, Srikanth, e Neelima Manchikanti. "Birefringence in ophthalmic lenses". Indian Journal of Ophthalmology - Case Reports 1, n. 3 (2021): 455. http://dx.doi.org/10.4103/ijo.ijo_2709_20.

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Faria‐e‐Sousa, Sidney Julio. "Sagitta of ophthalmic lenses". Ophthalmic and Physiological Optics 40, n. 6 (18 settembre 2020): 828–29. http://dx.doi.org/10.1111/opo.12732.

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de Lega, A. Colonna. "Coatings for ophthalmic lenses". Optics News 15, n. 7 (1 luglio 1989): 16. http://dx.doi.org/10.1364/on.15.7.000016.

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Freeman, M. "Keynote address: Ophthalmic lenses". Ophthalmic and Physiological Optics 10, n. 1 (gennaio 1990): 112. http://dx.doi.org/10.1016/0275-5408(90)90189-6.

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No, Jung-Won, Dong-Hyun Kim, Min-Jae Lee, Duck-Hyun Kim, Tae-Hun Kim e A.-Young Sung. "Preparation and Characterization of Ophthalmic Lens Materials Containing Titanium Silicon Oxide and Silver Nanoparticles". Journal of Nanoscience and Nanotechnology 15, n. 10 (1 ottobre 2015): 8016–22. http://dx.doi.org/10.1166/jnn.2015.11240.

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Hydrogel ophthalmic lenses containing fluorine-substituted aniline group, titanium silicon oxide nanoparticles, and silver nanoparticles were copolymerized, and the physical and optical properties of the hydrogel lenses were measured. To produce the hydrophilic ophthalmic lenses, the additives were added to the mixture containing HEMA, NVP, MA, EGDMA, and AIBN. The cast mold method was used for the manufacture of the hydrogel ophthalmic lenses, and the produced lenses were completely soaked in a 0.9% NaCl normal saline solution for 24 hours for hydration. The physical properties of the produced macromolecule showed that the water content was 32.5–37.6%, the refractive index was 1.450–1.464, the UV-B transmittance was 0.5–35.2%, and the contact angle was between 56 and 69°. Also, the addition of aniline, titanium silicon oxide, and silver nanoparticles allowed the ophthalmic lenses to block UV. These results show that the produced macromolecule can be used as hydrophilic lenses for ophthalmologic purposes that can block UV.

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Yuen, Gloria S.-C., B. Ralph Chou, Thao PT Ngo, Brian B. Cheng e Stephen J. Dain. "Prescription compliance in ophthalmic lenses". Clinical and Experimental Optometry 94, n. 4 (24 gennaio 2011): 341–47. http://dx.doi.org/10.1111/j.1444-0938.2010.00566.x.

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STROUD, JACKSON S. "Localized Defects in Ophthalmic Lenses". Optometry and Vision Science 66, n. 3 (marzo 1989): 141–45. http://dx.doi.org/10.1097/00006324-198903000-00002.

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Limon, Ofer, e Zeev Zalevsky. "Ophthalmic halo reduced lenses design". Optics Communications 342 (maggio 2015): 253–58. http://dx.doi.org/10.1016/j.optcom.2014.12.049.

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Toffoletto, Nadia, Benilde Saramago e Ana Paula Serro. "Therapeutic Ophthalmic Lenses: A Review". Pharmaceutics 13, n. 1 (28 dicembre 2020): 36. http://dx.doi.org/10.3390/pharmaceutics13010036.

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An increasing incidence of eye diseases has been registered in the last decades in developed countries due to the ageing of population, changes in lifestyle, environmental factors, and the presence of concomitant medical conditions. The increase of public awareness on ocular conditions leads to an early diagnosis and treatment, as well as an increased demand for more effective and minimally invasive solutions for the treatment of both the anterior and posterior segments of the eye. Despite being the most common route of ophthalmic drug administration, eye drops are associated with compliance issues, drug wastage by lacrimation, and low bioavailability due to the ocular barriers. In order to overcome these problems, the design of drug-eluting ophthalmic lenses constitutes a non-invasive and patient-friendly approach for the sustained drug delivery to the eye. Several examples of therapeutic contact lenses and intraocular lenses have been developed, by means of different strategies of drug loading, leading to promising results. This review aims to report the recent advances in the development of therapeutic ophthalmic lenses for the treatment and/or prophylaxis of eye pathologies (i.e., glaucoma, cataract, corneal diseases, or posterior segment diseases) and it gives an overview of the future perspectives and challenges in the field.

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Eppig, Timo, Alexis Speck, Melanie Gillner, Dieter Nagengast e Achim Langenbucher. "Photochromic dynamics of ophthalmic lenses". Applied Optics 51, n. 2 (4 gennaio 2012): 133. http://dx.doi.org/10.1364/ao.51.000133.

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Tesi sul tema "Ophthalmic lenses"

Marks, Randall Lee. "Fluidic Astigmatic and Spherical Lenses for Ophthalmic Applications". Diss., The University of Arizona, 2010. http://hdl.handle.net/10150/193956.

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Fluidic lenses have been developed for ophthalmic applications. The lenses use a pressure differential to deform a membrane, which separates two fluids with different indexes of refraction. The change in membrane shape creates changes in the optical wavefront. By utilizing different boundary conditions on the membrane, the progression of the membrane shape can be controlled. Specifically, a circular restraint is used to produce optical power, whereas a rectangular restraint is used to produce a combination of power and astigmatism. These lenses are analyzed for dominant properties and wavefront quality. By combining 2 rectangular restraint lenses at 45° and a circular restraint lens, both orthogonal second order Zernike astigmatisms as well as second order power can be independently controlled. This combination can also be described as independent control of ophthalmic cylinder, cylinder axis, and power, which is required to create a basic phoropter. A fluidic phoropter is demonstrated and analyzed in this manuscript.

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Kapoor, Yash. "Controlled ophthalmic drug delivery by surfactant-laden contact lenses". [Gainesville, Fla.] : University of Florida, 2008. http://purl.fcla.edu/fcla/etd/UFE0022886.

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Gulsen, Derya. "Ophthalmic drug delivery through nanoparticle-laden soft contact lenses". [Gainesville, Fla.] : University of Florida, 2004. http://purl.fcla.edu/fcla/etd/UFE0008247.

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Villegas, Ruiz Eloy Ángel. "Wave aberrations in ophthalmic progressive power lenses and impact on visual quality". Doctoral thesis, Universidad de Murcia, 2009. http://hdl.handle.net/10803/10843.

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Las lentes progresivas (LP) para gafas es una solución muy extendida para la presbicia, ya que proporcionan una visión continua a todas las distancias debido a un cambio progresivo de potencia. En este trabajo se han medido las aberraciones de frente de onda espacialmente resueltas y la calidad visual en estas lentes. Además del astigmatismo que aumenta periféricamente, también se han encontrado pequeños valores de aberraciones de tercer orden, coma y trefoil, que producen un bajo deterioro de la calidad óptica y visual. El logaritmo de métricas sobre la PSF del sistema lente con ojo son las que mejor predicen la agudeza visual. Durante la primera semana de adaptación, no se aprecia una mejora significativa de la agudeza visual a través de distintas zonas de las LPs. Al comparar diferentes LPs, las aberraciones, principalmente el astigmatismo, se comporta como un colchón de agua, que se puede mover pero no eliminar.
Progressive lenses (PL) are designed to provide continuous vision at all distances by means a progressive change in spherical power from upper to lower zones. In this thesis, we measure the spatially resolved aberrations and the visual quality of PLs. In addition to astigmatism, third order aberrations, coma and trefoil, are also found in the PLs, but the impact of these aberrations on visual performance is limited. The logarithm of metrics on the PSF of the entire system eye plus PL are the parameters that best predict the visual acuity. There is not a significant improvement of visual acuity through the different zones of the PLs during the first week of adaptation. The current designs of PLs are somehow similar to a waterbed, with the aberrations, mainly astigmatism, being the water: they can be moved but they cannot be eliminated.

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Abbas, Ibtisam. "Optimization of the optical properties of electrostrictive polyurethane for a smart lens thesis submitted in partial fulfilment of the degree of Master of Engineering, Auckland University of Technology, February 2005". Full thesis. Abstract, 2005. http://puka2.aut.ac.nz/ait/theses/AbbasI.pdf.

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Jha, Raj S. "Performance and psychological testing of bifocals and progressive lenses". Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/12950.

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Mendiola-Anda, Gabriel. "Design of surfaces under physical constraints and its application to the design of ophthalmic lenses". Thesis, University of East Anglia, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.429612.

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Ali, Haider K. "Toughening polymer surfaces". Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20070130.162644/index.html.

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Huang, Ching-Yao. "Measurement and Comparison of Progressive Addition Lenses by Three Techniques". The Ohio State University, 2011. http://rave.ohiolink.edu/etdc/view?acc_num=osu1306849853.

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Kaphle, Dinesh. "Ciliary muscle function and accommodation in myopia". Thesis, Queensland University of Technology, 2021. https://eprints.qut.edu.au/212645/1/Dinesh_Kaphle_Thesis.pdf.

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Myopia (short-sightedness) is a progressive condition often associated with near work. This research investigated the accommodation system during treatment with myopia-control multifocal spectacles. Meta-analysis of prior work showed that effectiveness of multifocal spectacles reduces with time, even after the first six months. During accommodation, the anterior ciliary muscle thickens, and its overall length reduces, in both emmetropes and myopes. Myopes have the larger lags of accommodation. Multifocal spectacles initially decrease the lags, but over-time the lags increase, and upgrading addition power by 0.50D restores the initial effect. Modifications to add power can sustain the treatment effect for longer periods.

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Più fonti

Libri sul tema "Ophthalmic lenses"

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

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H, Guenther Karl, Society of Photo-optical Instrumentation Engineers., Association nationale de la recherche technique., Conference 601, Ophthalmic Optics (1985 : Cannes, France) e International Technical Symposium on Optical and Electro-Optical Applied Science and Engineering (2nd : 1985 : Cannes, France), a cura di. Ophthalmic optics. Bellingham, Wash., USA: SPIE, 1986.

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Mannis, Mark J., Karla Zadnik, Cleusa Coral-Ghanem e Newton Kara-José. Contact Lenses in Ophthalmic Practice. New York, NY: Springer New York, 2004. http://dx.doi.org/10.1007/b97494.

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Tunnacliffe, A. H. Worked problems in ophthalmic lenses. 2^a ed. London: The Association of British Dispensing Opticians, 1991.

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Tunnacliffe, Alan H. Worked problems in ophthalmic lenses. 3^a ed. London: The Association of British Dispensing Opticians, 1997.

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E, Hagman Robert, e Fratello Cosmo J, a cura di. Dictionary of ophthalmic optics. Boston: Butterworth-Heinemann, 1995.

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Dornic, Dean. Ophthalmic pocket companion. 5^a ed. Boston: Butterworth-Heinemann, 1999.

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Brooks, Clifford W. Understanding lens surfacing. Boston: Butterworth-Heinemann, 1992.

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Ophthalmic, and Visual Optics Topical Meeting (1992 Santa Fe New Mexico). Ophthalmic and visual optics: Summaries of papers presented at Ophthalmic and Visual Optics Topical Meeting, January 28-30, 1992, Santa Fe, New Mexico. Washington, DC (2010 Massachusetts Ave., NW, Washington 20036): The Society, 1992.

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D, Lindquist Thomas, e Lindstrom Richard L, a cura di. Ophthalmic surgery: Looseleaf and update service. Chicago: Year Book Medical Publishers, 1990.

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Capitoli di libri sul tema "Ophthalmic lenses"

Schmidtmann, Gunnar. "Ophthalmic Lenses". In Clinical Vision Science, 53–76. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-35340-7_4.

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Malacara, Daniel. "Ophthalmic lenses". In Handbook of Visual Optics, 173–85. 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/10.1201/9781315373027-10.

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Ford, Wendy M. "Contact Lenses". In 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". In Certified Ophthalmic Assistant Exam Review Manual, 23–38. 3^a ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522942-3.

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Ledford, Janice K. "Contact Lenses". In Certified Ophthalmic Technician Exam Review Manual, 415–42. 3^a ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522973-18.

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Ledford, Janice K. "Contact Lenses". In Certified Ophthalmic Technician Exam Review Manual, 99–133. 2^a ed. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003522966-5.

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de Oliveira, Paulo Ricardo, e Melissa D. Bailey. "Therapeutic Contact Lenses". In Contact Lenses in Ophthalmic Practice, 197–203. New York, NY: Springer New York, 2004. http://dx.doi.org/10.1007/0-387-21758-4_20.

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Calabria, G., e F. Rathschuler. "Contact Lenses as Therapeutic Systems". In Ophthalmic Drug Delivery, 67–81. New York, NY: Springer New York, 1987. http://dx.doi.org/10.1007/978-1-4757-4175-9_8.

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Shukla, Aaron V. "Contact Lenses". In Clinical Optics Primer for Ophthalmic Medical Personnel, 191–98. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003523109-29.

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Shukla, Aaron V. "Spherical Lenses". In Clinical Optics Primer for Ophthalmic Medical Personnel, 105–7. Boca Raton: CRC Press, 2024. http://dx.doi.org/10.1201/9781003523109-18.

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Atti di convegni sul tema "Ophthalmic lenses"

Chang, Ming-Wen, Wen-Shing Sun e Chuen-Lin Tien. "The design of ophthalmic lens by using nonconic aspherics optimized with high order aspheric surface coefficients". In International Optical Design Conference. Washington, D.C.: Optica Publishing Group, 1998. http://dx.doi.org/10.1364/iodc.1998.lthc.4.

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Coddington's can be used to eliminate the oblique astigmatic error in the design of ophthalmic lens of spherical or other conicoidal surfaces. But it is difficult to do the same way to the nonconic aspheric ophthalmic lens design. In this paper we will present an efficient approach based on optimization of aspheric coefficients which enable the design program to obtain the minimum aberrations. Many high order coefficients of aspheric surfaces can easily result in inflection point, which increases difficulty in manufacturing. We solved the problem in the optimization as a target. The design of nonconic aspheric ophthalmic lens could obtain spectacle lenses well thinner in thickness and well flatter in shape than spherical ophthalmic lens and other conicoidal ophthalmic lens. In this paper, we use damping least square meathod to design aspherical myopia ophthalmic lenses, aspheric hyperocular lenses and cataract lenses. Design examples are given and comparisons are made.

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Krefman, Ronald A. "Comparison of Spheric, Low and High Asphericity Lenses for Hyperopia". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofe.5.

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Aspheric lens design is recognized as the preferred method of reducing aberrations, minimizing magnification and ring scotoma, enhancing peripheral vision, and making high plus (over +10.00D) powered ophthalmic and aphakic lenses thinner and lighter weight. Aspheric lenses have progressively flatter curvature towards the lens periphery and can be categorized by the degree of asphericity or amount of "drop". Higher degrees of asphericity emphasize wider visual fields and minimizing the ring scotoma while lower asphericity lenses emphasize peripheral acuity and minimize distortion. In general, aspheric design improves the off axis performance of any high plus lens by reducing aberrations. The use of aspheric lenses also results in flatter, thinner and lighter weight lenses.

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Galceran, Jean P. "Standards On Ophthalmic Lenses". In 1988 International Congress on Optical Science and Engineering, a cura di Peter Langenbeck. SPIE, 1989. http://dx.doi.org/10.1117/12.949473.

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Davis, John K., e Richard P. Waido. "Dispersion in Ophthalmic Lenses". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofc.1.

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Baumbach, P., e G. Guilino. "Distortion of Progressive Addition Lenses". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/ovo.1992.thc4.

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It is necessary to distinguish between monocular and binocular perception of lens distortion. Monocular distortion is seen as a local change in size inside the visual field or as a distortion of straight lines or right angles. In its binocular form, the different distortion in the two lenses (assuming binocular single vision) has a spatial effect which impairs stereopsis. A spectacle wearer with spherical minus power lenses will interpret a surface in space which is actually level as having a convex curvature.

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Kusel, R. "Optical Properties of Bifocal Intraocular Lenses". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofb.2.

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Apart from monofocal intraocular lenses (IOL) increasing numbers of bifocal IOLs are implanted. Besides the basic refractive power necessary for far vision these lenses have an additional refractive power which allows near vision. Since two images are superimposed upon each other, the contrast of the retinal image is reduced. If the correct lens is implanted the patient needs no glasses, otherwise he will need only monofocal glasses.

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Campbell, Melanie C. W., W. Neil Charman, Linda Voisin e Chengwu Cui. "Psychophysical Measurement of the Optical Quality of Varifocal Contact Lenses". In 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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Regener, Victor. "Spectacles with Adjustable Power". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1992. http://dx.doi.org/10.1364/ovo.1992.pd1.

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Spectacles with manually adjustable power are intended for persons who need a single corrective device for all distances. The design of these spectacles employs two lenses for each eye, one lens of positive power and one lens of negative power. When the lenses are in contact or in close proximity their combined power is designed to be zero for an emmetropic eye, or else it is designed to conform to the prescription for distant vision of a myopic or a hyperopic eye. By mechanically adjusting the spacing between the lenses the wearer achieves visual acuity for any distance.

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Ahsbahs, F., e J. L. Mercier. "Modern Design of Unifocal Lenses". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1991. http://dx.doi.org/10.1364/ovo.1991.fa2.

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An unifocal ophthalmic lens is an optical system, in which image formation follows the same rules just as in classical optical design applied to zooms or telescopes. The geometrical model is sufficient, in most cases, for predicting the images, so the designer has to cope with classical chromatic and geometric aberrations. We will describe the philosophy of the modern software tools for automatic optical design by optimization, which are the unique way to design complex aspheric modern lenses.

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Munger, Rejean, Catherine M. Burns e Melanie C. W. Campbell. "Understanding Changing Grin Profiles in Postmortem Crystalline Lenses". In Ophthalmic and Visual Optics. Washington, D.C.: Optica Publishing Group, 1993. http://dx.doi.org/10.1364/ovo.1993.ofa.4.

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Quantitative knowledge of the optical properties of the crystalline lens is essential if one expects to model accurately the optical properties of vertebrate eyes. The gradient of refracting index, GRIN, within the lens is responsible for a large part of the refractive properties of the crystalline lens. It is thus essential that the GRIN profile of crystalline lenses be accurately specified before a satisfactory understanding of the optical properties of vertebrate eyes is attained.

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