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Tesis sobre el tema "Ophthalmic lenses"

Autor: Grafiati

Publicado: 4 de junio de 2021

Última modificación: 31 de julio de 2024

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1

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 wavefron

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2

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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3

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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4

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 q

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5

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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6

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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7

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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8

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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9

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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10

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 add

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11

Ongkasin, Kanjana. "Elaboration de dispositifs médicaux ophtalmiques à libération contrôlée de médicaments par imprégnation supercritique." Thesis, Aix-Marseille, 2019. http://www.theses.fr/2019AIXM0536.

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Les technologies utilisant le CO2 supercritique sont considérées comme des alternatives vertes et éco-responsables pour la formulation de médicaments et le traitement de dispositifs médicaux. Ce travail de thèse a pour objectif de développer des dispositifs médicaux ophtalmiques innovants pour prévenir deux complications postopératoires de la chirurgie de la cataracte, l’endophtalmie et l’opacification de la capsule postérieure. Parmi d'autres procédés, l'imprégnation supercritique a été sélectionnée pour incorporer des principes actifs ophtalmiques dans des implants intraoculaires (IOLs) disp

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12

Barros, Rodrigo. "Testes oftalmológicos e poder dióptrico da lente intraocular em lobo guará (Chrysocyon brachyurus - Illinger, 1815)." Botucatu, 2018. http://hdl.handle.net/11449/180345.

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Orientador: Cláudia Valéria Seullner Brandão<br>Resumo: Este trabalho tem como objetivo descrever valores oftalmológicos, determinar o poder dióptrico da lente intraocular (LIO), além de comparar os olhos considerando a lateralidade e sexo nesta espécie e avaliar a hipótese que os valores são similares com o cão. O lobo guará (Chrysocyon brachyurus) encontra-se na lista vermelha de espécies em extinção do The International Union for Conservation of Nature (IUCN), de animais em quase ameaça. As principais causas são a caça indiscriminada e atropelamentos. A espécie possui hábitos noturnos e cre

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13

Stuckey, Jane Ashley. "Preliminary analysis of ophthalmic prednisolone acetate and diclofenac on diabetes mellitus regulation in 12 of 40 dogs." Thesis, Kansas State University, 2014. http://hdl.handle.net/2097/17395.

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Master of Science<br>Department of Clinical Sciences<br>Amy Rankin<br>Objective- To evaluate the use of a topical ophthalmic steroid (1% prednisolone acetate) and non-steroidal anti-inflammatory drug (0.1% diclofenac) on blood glucose concentrations, serum fructosamine concentrations, and clinical scores in diabetic dogs with cataracts using descriptive analysis. Animals- Twelve client-owned dogs with naturally-occurring, controlled (per history and physical examination), insulin-treated diabetes mellitus and cataract. A total of 40 dogs will be enrolled in the study, as determined by powe

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14

Meslard, Jean-Claude. "Immobilisation temporaire de medicaments par des liaisons hydrolysables sur des polymeres biocompatibles : application a l'ophtalmologie." Paris 6, 1988. http://www.theses.fr/1988PA066417.

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L'objectif est l'immobilisation reversible de medicaments (chloramphenicol, indometacine) au sein de lentilles de contact hydrophiles permettant une liberation lente et continue lors de leur adaptation sur des yeux malades

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15

，YI-HUAN, HUNG, and 洪億桓. "Measurement Analysis of Blue Light Filters for Ophthalmic Lenses." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/hn25k3.

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碩士<br>逢甲大學<br>視光科技碩士在職學位學程<br>106<br>Abstract In this study, we measure different blue light filters for ophthalmic lenses on the market, and use an optical spectrometer to measure the transmittance as a function of the wavelength. In order to study the effect of blue light, different kinds of blue light sources were also investigated. There are a large variety of commercially available blue-light-blocking lenses which emphasize theiranti-blue-light effects. We also studied13commercial anti-blue-light filters used as ophthalmic lenses, and analyzed the optical transmission spectrum and the co

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16

Carlson, Anthony Stephen. "The potential of the pinhole as a visual aid in the developing world." Thesis, 2015. http://hdl.handle.net/10210/14052.

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M.Phil. (Optometry)<br>Significant vision impairment caused by uncorrected distance or near vision (at a level defined by The World Health Organization as a disability) affects over 600 million people globally (9% of the world’s population). Over 3.5 billion people (52% of the world’s population) need some form of vision correction to see clearly. By 2020, this number is projected to reach 6.1 billion, 66% of the world’s population. Vision impairment is an important issue affecting the everyday lives of these 3.5 billion people worldwide. Two thirds of those affected live in the less developed

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17

Moore, Linda A. "The subjective and objective effects of tinted spectacle lenses on visual performance." Thesis, 2012. http://hdl.handle.net/10210/6056.

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M.Phil.<br>Tinted spectacle lenses have long been worn to provide ocular protection from harmful electromagnetic radiation during recreational activities. Controversy exists surrounding the colour of the spectacle tints and the environmental conditions under which these tints are worn. There is little scientific evidence to substantiate the many opinions of authors on the effects of tinted spectacle lenses on visual skills and, ultimately, on overall performance in recreational situations. This study serves to provide scientific data concerning the effects of tinted lenses on static visual acu

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18

Ramkissoon, Prithipaul. "The effect of tinted lenses on colour discrimination and contrast sensitivity." Thesis, 2008. http://hdl.handle.net/10210/1347.

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19

Thredgold, Jane. "Mathematical modelling of the deformation of spectacle lenses." 2007. http://arrow.unisa.edu.au:8081/1959.8/28379.

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SOLA International, a company which manufactures optical lenses, attended the 2000 Mathematics-in-Industry Study Group (MISG) with a wish list. Topping this list was the creation of a mathematical model of a lens, which given the lens geometry and material properties, could predict the deformation of the lens when it was subjected to an impact, such as that experienced in the fracture tests lenses must pass before being approved for sale. The first steps towards such a model were taken at MISG. At MISG, a lens was modelled simply as a thin uniform thickness plate, undergoing small, linear defo

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20

Tran, Nguyen-Phuong-Dung, and Nguyen-Phuong-Dung Tran. "Preparation and Ophthalmic Performance of Silicone Hydrogel Contact Lenses Composing of TRIS, DMA, NVP, HEMA and Silicone Nanoparticles." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/r4bq8v.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>107<br>This thesis is aiming to investigate the effect of the composition on the physical and biological properties of silicone contact lenses. This thesis is divided into three parts to conduct the investigation. In the first part, soft lenses were synthesized by the polymerization of 3-(methacryloyloxy)propyltris(trimethylsiloxy)silane (TRIS), N,N-dimethylacrylamide (DMA), 1-vinyl-2-pyrrolidinone (NVP), and 2-hydroxyethylmethacrylate (HEMA). The physical and biochemical characterizations of silicone hydrogel lenses were measured by methods comprising equilibrium

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21

"Wave aberrations in ophthalmic progressive power lenses and impact on visual quality. Aberraciones en lentes oftálmicas de potencia progresiva y su impacto en la calidad visual." Universidad de Murcia, 2009. http://www.tesisenred.net/TDR-0312110-143125/index_cs.html.

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22

Pereira, Marisa Cristina Sobral da Silva. "Implementação das lentes oftálmicas Nikon em Portugal." Master's thesis, 2010. http://hdl.handle.net/10071/3788.

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O caso prático apresentado foi desenvolvido no âmbito da realização do Mestrado de Continuidade em Gestão no Instituto Universitário de Lisboa – ISCTE. Quanto à temática, centra-se no âmbito da Gestão e do Marketing Relacional aplicados á realidade do mercado português de lentes oftálmicas. O mercado da óptica em Portugal é considerado altamente estruturado e os players existentes têm uma elevada notoriedade junto dos consumidores. Será analisado, tanto ao nível das lentes oftálmicas como das armações e óculos de sol. A marca Nikon tem já um longo percurso no que diz respeito à inovação tec

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23

McCanna, David. "Development of Sensitive In Vitro Assays to Assess the Ocular Toxicity Potential of Chemicals and Ophthalmic Products." Thesis, 2009. http://hdl.handle.net/10012/4338.

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The utilization of in vitro tests with a tiered testing strategy for detection of mild ocular irritants can reduce the use of animals for testing, provide mechanistic data on toxic effects, and reduce the uncertainty associated with dose selection for clinical trials. The first section of this thesis describes how in vitro methods can be used to improve the prediction of the toxicity of chemicals and ophthalmic products. The proper utilization of in vitro methods can accurately predict toxic threshold levels and reduce animal use in product development. Sections two, three and four describe t

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24

Πέττα, Βασιλική. "Συσχετισμός δυναμικών ιδιοτήτων των οφθαλμικών ιστών και παθήσεων του οφθαλμού. Μη-επεμβατική διάγνωση με την χρήση τεχνικών σκέδασης φωτός laser". Thesis, 2007. http://nemertes.lis.upatras.gr/jspui/handle/10889/626.

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Λόγω της διαφάνειας των οφθαλμικών ιστών η σκέδαση φωτός αποτελεί ιδανικό εργαλείο για την ανίχνευση των αρχικών σταδίων ορισμένων παθολογικών τους καταστάσεων. Για παράδειγμα, η θόλωση του φακού των θηλαστικών λόγω ηλικίας ή/και άλλων εξωγενών αιτίων καλείται καταρράκτης. Ο καταρράκτης δεν μπορεί να διαγνωστεί κλινικά σε πρώιμο στάδιο με αποτέλεσμα την δημιουργία σοβαρών προβλημάτων στην όραση. Το γεγονός ότι το φως έχει την ικανότητα να ανιχνεύει τις μοριακές αλλαγές οι οποίες είναι πρόδρομα συμπτώματα του καταρράκτη αναδεικνύει την σημασία της έγκαιρης διάγνωσης στην αντιμετώπιση διάφορων ο

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