Relevant bibliographies by topics / Intraocular pressure – Measurement

Academic literature on the topic 'Intraocular pressure – Measurement'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Intraocular pressure – Measurement"

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Evans, Kevin. "Intraocular pressure measurement in children." Ophthalmic and Physiological Optics 13, no. 2 (April 1993): 219–21. http://dx.doi.org/10.1111/j.1475-1313.1993.tb00460.x.

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Liu, John H. K. "Diurnal Measurement of Intraocular Pressure." Journal of Glaucoma 10, Supplement 1 (October 2001): S39—S41. http://dx.doi.org/10.1097/00061198-200110001-00015.

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Prazak, D., R. Ziolkowski, D. Rosu, M. Schiebl, J. Rybar, P. Pavlasek, E. Sinir, and F. Pluhacek. "Metrology for intraocular pressure measurements." ACTA IMEKO 9, no. 5 (December 31, 2020): 353. http://dx.doi.org/10.21014/acta_imeko.v9i5.999.

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The World Health Organization reports glaucoma as the second leading cause of blindness and the leading cause of irreversible blindness. Intraocular hypertension is the most relevant and only treatable risk factor for the disease. Non-invasive intraocular-pressure (IOP) measurements, carried out using eye tonometers, are used to screen for the intraocular hypertension. A correct measurement of the IOP is essential in the prevention and the fight against glaucoma. The authors present their work towards ensuring on one side the accuracy of IOP measurements for contact and non-contact tonometers in the Central European region and obtaining a harmonization of the requirements for IOP metrology at national level.
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de Padua Soares Bezerra, Bernardo, Elsie Chan, Rahul Chakrabarti, and Rasik B. Vajpayee. "Intraocular pressure measurement after corneal transplantation." Survey of Ophthalmology 64, no. 5 (September 2019): 639–46. http://dx.doi.org/10.1016/j.survophthal.2019.02.011.

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Gillow, J. T., and R. Aggarwal. "Reducing bias during intraocular pressure measurement." British Journal of Ophthalmology 79, no. 11 (November 1, 1995): 1057–58. http://dx.doi.org/10.1136/bjo.79.11.1057-b.

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Wright, M. M., and A. L. Grajewski. "Measurement of intraocular pressure after epikeratophakia." British Journal of Ophthalmology 81, no. 6 (June 1, 1997): 448–51. http://dx.doi.org/10.1136/bjo.81.6.448.

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Schipper, Isac. "Photorefractive Keratectomy and Intraocular Pressure Measurement." Journal of Cataract & Refractive Surgery 26, no. 5 (May 2000): 631. http://dx.doi.org/10.1016/s0886-3350(00)00458-2.

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Agarwal, Tushar, Robit Saxena, and Rasik B. Vajpayee. "Intraocular Pressure Measurement After Refractive Surgery." Journal of Cataract & Refractive Surgery 28, no. 3 (March 2002): 384–85. http://dx.doi.org/10.1016/s0886-3350(02)01259-2.

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Munger, Rejean. "Intraocular Pressure Measurement After Refractive Surgery." Journal of Cataract & Refractive Surgery 28, no. 3 (March 2002): 385. http://dx.doi.org/10.1016/s0886-3350(02)01260-9.

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Leung, Christopher K. "Significance of Diurnal Intraocular Pressure Measurement." Asia-Pacific Journal of Ophthalmology 1, no. 2 (2012): 65–66. http://dx.doi.org/10.1097/apo.0b013e318249f7d6.

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Dissertations / Theses on the topic "Intraocular pressure – Measurement"

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Hallberg, Per. "Applanation Resonance Tonometry for Intraocular Pressure Measurement." Doctoral thesis, Umeå : Tillämpad fysik och elektronik, Umeå univ, 2006. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-784.

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Jóhannesson, Gauti. "Intraocular pressure : clinical aspects and new measurement methods." Doctoral thesis, Umeå universitet, Oftalmiatrik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-40383.

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Intraocular pressure (IOP) measurement is a routine procedure and a fundament in glaucoma care. Elevated IOP is the main risk factor for glaucoma, and to date, reduction of IOP is the only possible treatment. In a retrospective clinical material, the prevalence of open angle glaucoma was estimated on the west coast of Iceland. IOP measurement and optic nerve head examination were used to capture glaucoma suspects, within the compulsory ophthalmological examination for the prescription of eye glasses. The results were mainly in agreement with a recent prospective study in the same region. This indicated that retrospective data, under certain conditions, may contribute with useful information on the prevalence of glaucoma. However, normal tension glaucoma is underestimated if perimetry and/or fundus photography are not included in the examination. Three studies focused on the measurement of IOP. Goldmann applanation tonometry (GAT) is the standard method. GAT is affected by corneal properties, e.g. central corneal thickness (CCT) and corneal curvature (CC). Refractive surgery changes these properties. This has put focus on how corneal biomechanics translate into tonometric errors and stimulated the development of new methods. As a result, Pascal ® Dynamic Contour Tonometry (PDCT) and Icare® rebound tonometry have been introduced. A method under development by our research group is Applanation Resonance Tonometry (ART). It is based on resonance technology and estimates IOP from continuous measurement of force and contact area. Comparison of PDCT, Icare and GAT in a prospective study showed that the concordance to GAT was close to the limits set by the International Standard Organization (ISO) for PDCT, while Icare was outside the limits. To investigate if laser-assisted subepithelial keratectomy (LASEK) affects tonometry, a study was performed where measurements with GAT, PDCT and ART were obtained before, three and six months after LASEK. The hypothesis was that PDCT and ART would be less affected by LASEK than GAT. The results showed a statistically significant reduction of measured IOP three and six months after LASEK for all tonometry methods. Change in visual acuity and IOP between three and six months suggested a prolonged postoperative process. A servo-controlled prototype (ART servo) was developed. A study was undertaken to assess the agreement of ARTservo and a further developed v manual prototype (ART manual) with GAT. The study design was in accordance with the requirements of the ISO standard for tonometers. ARTmanual fulfilled the precision requirements of the ISO standard. ARTservo did not meet all the requirements of the standard at the highest pressure levels. Four tonometry methods, GAT, PDCT, Icare and ART, were investigated. None of them was independent of both CCT and CC. The inconsistencies in the results emphasize the importance of study design. A meta-analysis comprising healthy eyes (IOP ≤ 21 mmHg) in the three papers, revealed age as an important confounder. In summary, glaucoma prevalence in Iceland was investigated and the results indicated that a retrospective approach can contribute with meaningful information. ART and PDCT had a similar agreement to GAT. ART manual fulfilled the precision requirements set by the ISO-standard, ARTservo and PDCT were close, while Icare was distinctly outside the limits. All tonometry methods were affected by LASEK and no method was completely independent of corneal properties.
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Polyzoev, Vasco. "HAND-HELD TONOMETER FOR TRANSPALPEBRAL INTRAOCULAR PRESSURE MEASUREMENT." Diss., The University of Arizona, 2011. http://hdl.handle.net/10150/202517.

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This dissertation describes the development of a portable, hand-held tonometer for measurement of the intraocular pressure through the eyelid. The primary use of such device will be by people diagnosed with the eye disease glaucoma. Glaucoma is the second leading cause of blindness in the world and is asymptomatic to the patient in its early stages. This allows it to remain undiagnosed for prolonged periods, causing irreversible damage to the affected person's vision. Elevated intraocular pressure is the main risk factor associated with the development of glaucoma, and is currently the only symptom that is treatable for the slowing down or stopping of the progression to blindness caused by the disease. The effectiveness of the medications or procedures aimed at reducing the pressure to below risk levels is currently monitored through visits to the ophthalmologists' offices, which makes the frequent monitoring of the pressure inconvenient, expensive and sometimes impossible. Due to the variation of the pressure throughout the day and during different activities or food and beverage intake, the portability of the device is important in order to allow the user to carry it with them and take measurements as frequent as needed. The option to perform the measurement through the eyelid avoids direct contact with the eye, eliminating possible discomfort, the use of anesthetics, and the risk of contamination.Several designs and measuring concepts are evaluated using a custom made pressure regulation system. A series of prototypes have been built and tested and the results are reported in the respective sections of the dissertation. The final concept selected for the measurement technique was based on multiple force probe indentation and a custom MEMS-based force sensor for it was designed and tested.The main contributions of this dissertation are the design, fabrication and test of the prototype devices and the MEMS force sensors. The obtained results and experience described here can serve as a platform for further optimization and improvement of the device, and eventual development of a prototype capable of performing clinical research studies and passing FDA approval for home and clinical use.
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Chiu, Flora T. (Flora Tze Kwan). "An exploration of through-the-eye intraocular pressure measurement device." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/42118.

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Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2005.
Includes bibliographical references (leaves 70-71).
Glaucoma, caused by an elevated intraocular pressure (IOP), is one of the leading causes of blindness. As constant monitoring of IOP is essential in the treatment of glaucoma, the IOP measurement techniques described in patents and patent applications since 1950 are examined. None of the methods provides a simple and comfortable approach for patients to self monitor their IOPs at different times throughout the day. A through-the-eyelid tonometry method is proposed to address the deficiencies of the previous techniques. Two through-the-eyelid tonometers are designed, and parts of the prototypes are built.
by Flora T. Chiu.
M.Eng.
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Eklund, Anders. "Resonator sensor technique for medical use : An intraocular pressure measurement system." Doctoral thesis, Umeå University, Radiation Sciences, 2002. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-1.

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In the work of this doctoral dissertation a new resonator sensor technique, first presented in 1989, has been further developed and evaluated with focus on technical characteristics and applications within the medical field.

In a first part a catheter-type tactile sensor using the resonator sensor technique was evaluated in a silicone model and applied to human prostate in vitro. The main finding was that different histological compositions of prostate tissue correlated with the frequency shift, .fS, of the resonator sensor and that the common property was the hardness of the tissue. The results indicated that hardness of the prostate tissue, and maybe hardness of human tissue in general, can be expressed according to a cone penetration standard (DIN ISO 2137) and that the hardness can be measured with this tactile sensor system. The tissue hardness application for the resonator sensor technique has to be further developed and evaluated in a larger study. The study also produced results that has led to the basic understanding of the resonator sensor system. One important result was that .fS of the sensor system was related to the contact area between sensor and sample. This indicated that the resonance sensor could be used for contact area measurement.

In a second part, containing three studies, the area-sensing capability from the first study was utilised in the development and evaluation of the applanation resonator sensor (ARS) for measurement of intraocular pressure (IOP). For the purpose of evaluating IOP-tonometers, an in vitro pig-eye model was developed, and it was shown that a saline column connected to the vitreous chamber could be used successfully to induce variations in IOP.

A ARS sensor with a flat contact surface was applied onto the cornea with constant force and .fS was measured. A mathematical model based on the Imbert-Fick law and the assumption that .fS was linearly related to contact area was proposed and verified with a convincing result. IOP measured with the ARS correlated well (r=0.92, n=360) with the IOP elicited by a saline column.

The ARS in a constant-force arrangement was evaluated on healthy human subjects in vivo. The results verified the sensor principle but revealed a nonnegligible source of error in off-centre positioning between the sensor and cornea. The sensor probe was redesigned and evaluated in the in vitro model. The new probe, with a spherical contact surface against the eye reduced the sensitivity to off-centre positioning. It was also shown that a .fS normalisation procedure could reduce the between-eye differences.

The ARS method for IOP measurement was further developed using combined continuous force and area measurement during the dynamic phase when the sensor initially contacts the cornea. A force sensor was included with the resonator sensor in one probe. Evaluation was performed with the in vitro pig-eye model. The hypothesis was that the IOP could be deduced from the differential change of force and area during that phase. The study showed good accuracy and good reproducibility with a correlation of r=0.994 (n=414) between measured pressure in the vitreous chamber and IOP according to the ARS. Measurement time was short, 77 ms after initial contact. Problems with inter-eye differences and low resolution at high pressures were reduced. The ARS method is the first to combine simultaneous, continuous sampling of both parameters included in the applanation principle. Consequently, there is a potential for reducing errors in the clinical IOP tonometry.

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Luce, Alexander Vallejo. "Design of Automated Digital Eye Palpation Exam for Intraocular Pressure Measurement." Thesis, The University of Arizona, 2009. http://hdl.handle.net/10150/192537.

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Hamilton, Kirsten School of Optometry &amp vVsion Science UNSW. "Corneal hydration and the accuracy of Goldmann tonometry." Awarded by:University of New South Wales. School of Optometry and vVsion Science, 2006. http://handle.unsw.edu.au/1959.4/30468.

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The purpose of this thesis was to investigate the effect of corneal swelling on the accuracy of Goldmann tonometry estimates of intraocular pressure (IOP). In the first experiment, central corneal thickness (CCT, ultrasonic pachymetry), IOP (Goldmann tonometry) and corneal curvature (keratometry) was measured in one eye of 25 subjects every two hours for 24 hours, except for 8 hours overnight (no measurements taken), and for the first two hours after awakening (measurement frequency 20 minutes). CCT (+20.1??10.9 pm) and IOP (+3.1??2.4 mmHg) peaked on eye opening, and then decreased at a similar rate (r=0.967, p<0.001) for the next two hours. Corneal swelling may have influenced the accuracy of Goldmann IOP measurements during this time. In the second and third studies, the CCT, IOP and corneal curvature were measured in both eyes of two groups of 25 subjects before and after the induction of corneal swelling, resulting from two hours of monocular closed eye contact lens wear. The increase in IOP was correlated to the increase in CCT at a rate of 0.33 to 0.48 mmHg per 10 pm, which signified an overestimation error in Goldmann IOP measurement. However, the change in IOP could not be accounted for solely by the change in CCT. In the fourth study, CCT, IOP and corneal curvature were used in conjunction with the Orssengo-Pye algorithm to determine the range of Young's modulus in the normal population, which was 0.29??0.06 MPa. Physiological variations in Young's modulus had a similar effect on Goldmann tonometry to CCT. In the fifth study, the data collected for studies 2 and 3 was used to calculate the Young's modulus changes associated with corneal swelling, again with the assistance of the Orssengo-Pye algorithm. No systematic change in Young's modulus was recorded after contact lens wear, but the model suggested that corneal biomechanical changes were responsible for the remainder of the change in IOP. All experimental results were combined to develop a model to calculate the diurnal variation of Goldmann IOP errors. The likely error in IOP due to overnight corneal swelling was 0.6 to 1.4 mmHg, which may explain as much as 45% (1.4 mmHg) of the 3.1 mmHg diurnal variation of IOP. In summary, small amounts of corneal swelling were shown to have a clinically significant impact on the accuracy of Goldmann tonometry. This may interfere with the measurement of the diurnal variation of IOP, particularly if measurements are taken prior to the resolution of overnight corneal swelling.
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Ljubimova, Darja. "Biomechanics of the Human Eye and Intraocular Pressure Measurements." Doctoral thesis, KTH, Strukturmekanik, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11420.

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This thesis addresses the reliability of Goldmann-type applanation tonometers (GAT). It deals with the investigation of the relation between predicted intraocular pressure, IOPG and true pressure, IOPT. The problem of the accuracy of GAT readings has acquired special importance over the last two decades as new types of surgical procedures to correct vision disorders are being explored and gain universal acceptance. The overall aim of the present study is to assess the effects of individual variations in the corneal central thickness (CCT), material properties of the involved tissues and paracentral applanation on the accuracy of IOPG. Two finite element models have been constructed: a two-dimensional axisymmetric model of the cornea and a three-dimensional model of the whole corneoscleral envelope. Various material descriptions were adopted for the cornea in 2D, whereas the 3D model accounted for collagen microstructure and represented a hyperelastic ber reinforced material. Nonlinear analyses were carried out using the commercial general-purpose finite element software ABAQUS. An extensive literature survey and consultations with ophthalmologists and clinicians were the platform for establishing relevant modelling procedures. The results reveal a clear association between all considered parameters and measured IOPG. The effect of assumed CCT is highly dependent on the corneal material properties. Material model alone has a profound effect on predicted IOPG. Variations in tonometer tip application produce clinically signi cant errors to IOPG measurements. Potential effects of corneal stiffness and paracentral applanation on GAT readings are larger than the impact of CCT. The behaviour of the models is broadly in agreement with published observations. The proposed procedures can be a useful tools for suggesting the magnitudes of corrections for corneal biomechanics and possible human errors. The present modelling exercise has an ability to reproduce the behaviour of human cornea and trace it under IOP and GAT, providing potentially useful information on the distribution of stresses and strains. Some recommendations can be drawn in pursuit of the clinical imperatives of ophthalmologists.
QC 20100729
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Ko, Yu-Chieh, and 柯玉潔. "Effects of Corneal Thickness and Curvature on Intraocular Pressure Measurement." Thesis, 2004. http://ndltd.ncl.edu.tw/handle/55931854691351134771.

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碩士
國立陽明大學
臨床醫學研究所
92
Glaucoma refers a group of diseases with characterized optic neuropathy. They share certain features, including retinal ganglion cell apoptosis, and progressive cupping and atrophy of the optic nerve head, which has attendant visual field loss. Elevated intraocular pressure (IOP) is the most prominent risk factor for glaucoma, and lowering of IOP is the only contemporary ophthalmic intervention that can be reliably effective. Accurate estimation of IOP is important because it is an essential factor in precise patient classification in diagnosis and efficacy assessment of glaucoma treatment. Of all the tonometers being used, Goldmann applanation tonometer (GAT) was considered as the gold standard for IOP measurements for decades. However, studies comparing measurements with manometry and tonometry indicate that measuring central corneal thickness (CCT) is essential to properly interpret the results obtained with GAT. The IOP would be over- or under-estimated in subjects with thick or thin corneas respectively. The realization of a wide range of CCT in normal eyes and the advent of excimer laser refractive surgery prompted ophthalmologists to pay attention to the impact of CCT on IOP measurements. Besides, corneal curvature is also considered as a possible source of error in applanation tonometry. The noncontact tonometer (NCT) is now widely used as a screening tool for glaucoma. However, little is known about the impact of CCT on the NCT measurements. The ocular blood flow tonometer (OBFT) has been introduced as another option to measure IOP and pulsatile ocular blood flow. The manufacturers claim that IOP measurements with the OBFT are not affected by variations in CCT, a statement needs to be verified. In this study, we used three kinds of tonometers (GAT, NCT and OBFT) to measure IOP and performed ultrasound pachometry, and keratometry on glaucoma, ocular hypertension and control subjects. We compared the IOP measurements obtained with the various tonometers and then evaluated the relationship between CCT or corneal curvature and these measurements. After reviewing the literature, we adopted several correction formulae that take CCT and/or corneal curvature into account to estimate the true intraocular hydrostatic pressure from the GAT readings. We quantified the NCT and OBFT measurement errors related to the variation in CCT by using the corrected GAT values as the standard. We found that pressure readings with the GAT, NCT and OBFT were all affected by CCT, with the NCT being the one most affected and the GAT the least. A linear regression model indicated that a 10μm change in CCT could yield a 0.47 – 0.98 mmHg deviation in the NCT measurements and a 0.29 – 0.81 mmHg deviation in the OBFT measurements. For eyes with keratometric astigmatism less than 2 diopters, corneal curvature had no significant correlation with the IOP measurements.
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Kuei, Cheng-Kai, and 桂承楷. "Design, Fabrication and Measurement of RFID Tag for Intraocular Pressure Monitoring." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/vyrr2c.

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碩士
國立交通大學
電控工程研究所
103
In order to achieve long-term intraocular pressure (IOP) monitoring, this thesis presents a wireless readout system based on radio frequency identification (RFID) technology used to readout contact lens IOP sensor device. A digital baseband circuit, receive antenna and transmit antenna has been designed and fabricated to implement a pre-testing wireless IOP sensing tag. Considering the restriction on antenna size which is limited by contact lens, this thesis used 860 ~ 960 MHz as communication frequency band, designed a single-loop like antenna using inductive coupling to obtain higher energy transmission efficiency in near field under the conditions that the size of antenna is much smaller than the wavelength. The proposed sensing tag can perform 2 cm wireless sensing with 12.6 dBm RF power, and reached the maximum sensing distance of 7 cm under 30 dBm, which has met the requirement of our application. Furthermore, a next generation receive antenna has been designed and simulated, according to the pre-testing result, a 18.2 dBm RF power is needed to accomplish wireless sensing at distance of 2 cm.
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Book chapters on the topic "Intraocular pressure – Measurement"

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Sampaolesi, Roberto, Juan Roberto Sampaolesi, and Jorge Zárate. "Intraocular Pressure Measurement: Tonometry." In The Glaucomas, 101–4. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-35500-4_7.

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Liu, John H. K. "The Importance of Habitual 24-Hour IOP Measurement." In Intraocular and Intracranial Pressure Gradient in Glaucoma, 211–14. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-2137-5_30.

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Hu, Yan, and John Danias. "Noninvasive Intraocular Pressure Measurement in Animals Models of Glaucoma." In Glaucoma, 49–61. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-7407-8_5.

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Eddie, Malcolm, and Peter Lee. "Measurement of Intraocular Pressure in Cynomolgus Monkeys Using a Tonopen®." In Ocular Toxicology, 363–67. Boston, MA: Springer US, 1995. http://dx.doi.org/10.1007/978-1-4615-1887-7_42.

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Langham, Maurice E. "The Effect of Posture and Corneal Thickness on the Measurement of the Intraocular Pressure." In Ischemia and Loss of Vascular Autoregulation in Ocular and Cerebral Diseases, 71–75. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-09716-9_12.

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Fogagnolo, Paolo, Maurizio Digiuni, and Luca Rossetti. "Measurement of Intraocular Pressure with Goldmann Applanation Tonometry, Dynamic-Contour Tonometry, and Ocular Response Analyzer." In Glaucoma Imaging, 79–96. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-18959-8_3.

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Langham, Maurice E. "Indirect Measurements of the Intraocular Pressure and the Intraocular Pressure Pulse." In Ischemia and Loss of Vascular Autoregulation in Ocular and Cerebral Diseases, 67–69. New York, NY: Springer New York, 2009. http://dx.doi.org/10.1007/978-0-387-09716-9_11.

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Desai, Manishi. "Intraocular Pressure Measurement." In Glaucoma. Oxford University Press, 2012. http://dx.doi.org/10.1093/oso/9780199757084.003.0006.

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Intraocular pressure (IOP) measurement is a key test by which patients with glaucoma are clinically monitored. Clinical trials have demonstrated that a reduction in IOP results in a reduction in the risk of progression of glaucoma. Accordingly, measuring IOP with relative accuracy is very important in managing patients. There are multiple methods to measure IOP. The method used may depend on the particular clinical setting. All are surrogate measures in comparison to manometry (i.e., IOP measurement using an intracameral cannula), which is the most direct means to measure IOP. However, manometry is not practical for everyday clinical practice since it is invasive. This overview provides information about currently available methods to measure IOP and how they may be best applied. This section also outlines the advantages and disadvantages involved with these methods. Not all techniques are available to every practitioner, but knowing the principles behind these methods and the limitations should allow clinicians to more carefully interpret and reliably obtain IOP measurements using the techniques at their disposal. Goldmann applanation tonometry (GAT) is considered to be the standard by which IOP is measured for the average patient (i.e., average corneal thickness without apparent corneal abnormalities). GAT is also likely the measurement modality most readily available to practitioners. The Perkins tonometer is a handheld Goldmann applanation device (Fig. 1.1B). This is helpful when measuring IOP in children as it can be used in the upright or supine position and for patients unable to come to the slit lamp. Based on the Imbert-Fick principle Applanation diameter is 3.06 mm (not the size of the applanation tip, which is larger), so that 1 g of force represents 10 mmHg. Assumes the eye is a sphere, corneal thickness is estimated to be 0.52 mm, and volume displaced by contact is negligible Instill topical anesthetic and fluorescein dye. Clean tip (see recommended cleaning technique at end of this section). Position patient at slit lamp (for GAT). Set illumination to cobalt blue filter and set force knob/drum to 1 (which corresponds to 10 mmHg).
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Yolcu, Umit, Abdullah Ilhan, and Ahmet Tas. "Conventional Intraocular Pressure Measurement Techniques." In Glaucoma - Intraocular Pressure and Aqueous Dynamics. InTech, 2016. http://dx.doi.org/10.5772/67045.

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Salvetat, Maria Letizia, Marco Zeppieri, and Paolo Brusini. "Newer Intraocular Pressure Measurement Techniques." In Glaucoma - Intraocular Pressure and Aqueous Dynamics. InTech, 2016. http://dx.doi.org/10.5772/66260.

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Conference papers on the topic "Intraocular pressure – Measurement"

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Chen, Andrew, Arjun Virk, Zachery B. Harris, Azin Abazari, Robert Honkanen, and M. Hassan Arbab. "Noninvasive THz Measurement of Intraocular Pressure." In CLEO: Science and Innovations. Washington, D.C.: OSA, 2021. http://dx.doi.org/10.1364/cleo_si.2021.sw4f.7.

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Katuri, Kalyan C., Melur K. Ramasubramanian, and Sanjay Asrani. "A surface micromachined capacitive pressure sensor for intraocular pressure measurement." In 2010 IEEE/ASME International Conference on Mechatronic and Embedded Systems and Applications (MESA). IEEE, 2010. http://dx.doi.org/10.1109/mesa.2010.5552077.

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Phan, Alex, Phuong Truong, Alexander Kief, Milien Dhome, Andrew Camp, Robert N. Weinreb, and Frank E. Talke. "Optical intraocular pressure measurement system for glaucoma management." In 2017 IEEE Healthcare Innovations and Point-of-Care Technologies (HI-POCT). IEEE, 2017. http://dx.doi.org/10.1109/hic.2017.8227616.

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Yang, Libin, and Xingqun Zhao. "Retinal image acquisition system in intraocular pressure measurement." In 2010 3rd International Conference on Biomedical Engineering and Informatics (BMEI). IEEE, 2010. http://dx.doi.org/10.1109/bmei.2010.5639981.

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Faul, Andre, Matthew Turner, and John Naber. "Implantable wireless microsystems for the measurement of intraocular pressure." In 2011 IEEE 54th International Midwest Symposium on Circuits and Systems (MWSCAS). IEEE, 2011. http://dx.doi.org/10.1109/mwscas.2011.6026619.

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Enikov, Eniko T., Péter P. Polyvás, Gholam Peyman, and Sean Mccafferty. "Tactile Eye Pressure Measurement Through the Eyelid." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-50875.

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This article presents the early results from a 10-person human subject study evaluating the accuracy of a novel method of indirect estimation of intraocular pressure using tactile sensors. Manual digital palpation tonometery is an old method used to estimate the eye pressure through palpation with ones fingers. Based on this concept, we present an instrumented measurement method, where multiple tactile stiffness sensors are used to infer the intraocular pressure of the eye. The method is validated using experimental data gathered from human subjects with eye pressures from 15 to 22 mmHg and determined by Goldman applanation tonometry (GAT). Bland-Altman plots comparing the GAT measurements and the proposed through-the-eye-lid tonometry indicate a statistical error of 5.16 mmHg, within the 95% confidence interval, which compares favorably with the FDA-mandated error bound of 5 mmHg. Details on the unit operation and data filtering are also presented. Due to its indirect and non-invasive nature, the proposed new tactile tonometry method can be applied at home as a self-administered home tonometer for management of glaucoma.
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Bhatt, Mahabaleswara Ram, and Shyam Vasudeva Rao. "On imaging based non-contact tonometer for intraocular pressure measurement." In 2013 IEEE Point-of-Care Healthcare Technologies (PHT). IEEE, 2013. http://dx.doi.org/10.1109/pht.2013.6461293.

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Drescher, Joerg, Wilhelm Stork, Stefan Hey, Arnd Gundlach, Klaus-Dieter Mueller-Glaser, and Christine F. Kreiner. "Noncontact measurement of intraocular pressure using a modified Michelson interferometer." In BiOS '99 International Biomedical Optics Symposium, edited by Pascal O. Rol, Karen M. Joos, Fabrice Manns, Bruce E. Stuck, and Michael Belkin. SPIE, 1999. http://dx.doi.org/10.1117/12.350571.

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Phan, Alex, Kevin Joslin, Phuong Truong, Andrew Camp, and Frank E. Talke. "A Compact Optical Pressure Measurement System for Acquiring Intraocular Pressure and Ocular Pulse." In 2020 42nd Annual International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) in conjunction with the 43rd Annual Conference of the Canadian Medical and Biological Engineering Society. IEEE, 2020. http://dx.doi.org/10.1109/embc44109.2020.9175630.

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Luce, Alexander V., Eniko T. Enikov, and Bradley J. Nelson. "Design of automated digital eye palpation exam for intraocular pressure measurement." In 2009 ICME International Conference on Complex Medical Engineering - CME 2009. IEEE, 2009. http://dx.doi.org/10.1109/iccme.2009.4906663.

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