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Relevant bibliographies by topics / Contact lens / Dissertations / Theses

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Dissertations / Theses on the topic 'Contact lens'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Stapleton, Fiona J. "The pathogenesis and epidemiology of contact lens related disease in cosmetic contact lens wearers." Thesis, City University London, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280544.

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2

Nichols, Jason Jay. "Evaporative tear film and contact lens factors associated with dry eye symptoms in contact lens wearers." The Ohio State University, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=osu1085771728.

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3

Tagliaferri, Angela. "Risk Factors for Contact Lens Induced Papillary Conjunctivitis Associated with Silicone Hydrogel Contact Lens Wear." Case Western Reserve University School of Graduate Studies / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=case1339094018.

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4

Rueff, Erin M. "Contact Lens Discomfort, Vision Correction Preferences, and Accommodative Treatment in Presbyopic and Non-Presbyopic Contact Lens Wearers." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1529583462118691.

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5

Selby, Alastair Phillip. "Nanoindentation of soft contact lens materials." Thesis, University of Manchester, 2012. https://www.research.manchester.ac.uk/portal/en/theses/nanoindentation-of-soft-contact-lens-materials(502085d8-3325-4ea8-926c-ad75b15a557d).html.

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The launch of silicone hydrogel contact lenses has led to a rise in the incidence of mechanically-related clinical complications, which is thought to be due to the increased stiffness of these materials compared to conventional hydrogel lens materials. The mechanical characteristics of hydrogel contact lenses have traditionally been investigated using tensile testing which investigated the bulk material characteristics. This thesis presents a study intended to establish a repeatable method for local mechanical measurement of hydrogel contact lenses using nanoindentation. Hydrogel materials in

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6

Ng, Benny. "EMBEDDED POWER ACTIVE CONTACT LENS." DigitalCommons@CalPoly, 2015. https://digitalcommons.calpoly.edu/theses/1391.

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This thesis designed and fabricated an active contact lens that notiﬁes the user during the detection of an external wireless signal. The lens contained a printed antenna to communicate with a 2.4GHz system and provide inductive charging operating at 13.56 MHz. The lens utilizes a CBC005 5µAh thin ﬁlm battery by Cymbet as a power source. A custom IC was designed using the On Semiconductor CMOS C5 0.6 µm process to manage the battery and drive the display. A printed single element display using electrochromic ink was chosen as it is able to indicate the user when activated while staying transpa

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7

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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8

Nichols, Jason J. "Evaporative tear film and contact lens factors associated with dry eye symptoms in contact lens wearers." Connect to this title online, 2004. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1085771728.

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Thesis (Ph. D.)--Ohio State University, 2004.<br>Title from first page of PDF file. Document formatted into pages; contains xiii, 122 p.; also includes graphics Includes bibliographical references (p. 80-94). Available online via OhioLINK's ETD Center

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9

Liman, Muhammad Mukhtar. "Diamond turning of contact lens polymers." Thesis, Nelson Mandela Metropolitan University, 2017. http://hdl.handle.net/10948/19223.

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Contact lens production requires high accuracy and good surface integrity. Surface roughness is generally used to measure the index quality of a turning process. It has been an important response because it has direct influence toward the part performance and the production cost. Hence, choosing optimal cutting parameters will not only improve the quality measure but also the productivity. In this study, an ONSI-56 (Onsifocon A) contact lens buttons were used to investigate the triboelectric phenomena and the effects of turning parameters on surface finish of the lens materials. ONSI-56 specim

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10

Maissa, Cecile A. "Biochemical markers and contact lens wear." Thesis, Aston University, 1999. http://publications.aston.ac.uk/9627/.

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The project objective was to develop a reliable selection procedure to match contact lens materials with individual wearers by the identification of a biochemical marker for assessment of in-eye performance of contact lenses. There is a need for such a procedure as one of the main reasons for contact lens wearers ceasing wearing contact lenses is poor end of day comfort i.e. the lenses become intolerable to the wearer as the day progresses. The selection of an optimal material for individual wearers has the potential benefit to reduce drop Qut, hence increasing the overall contact lens populat

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11

Fagehi, Raied Ahmed. "Interferometric assessment of contact lens wettability." Thesis, Glasgow Caledonian University, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.688303.

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12

McClure, Kate Alexandra. "Tear Film Dynamics Associated with Contact Lens Wear." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523579680091666.

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13

Wolfe, Jessica Taylor. "Compliance and Education in Soft Contact Lens Wearers." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586539881925913.

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14

Ross, G. M. "Ocular biotribology and contact lens lubrication mechanisms." Thesis, Aston University, 2009. http://publications.aston.ac.uk/10925/.

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The work described in this thesis is concerned with mechanisms of contact lens lubrication. There are three major driving forces in contact lens design and development; cost, convenience, and comfort. Lubrication, as reflected in the coefficient of friction, is becoming recognised as one of the major factors affecting the comfort of the current generation of contact lenses, which have benefited from several decades of design and production improvements. This work started with the study of the in-eye release of soluble macromolecules from a contact lens matrix. The vehicle for the study was the

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15

Peach, Helena C. "The tear film and contact lens wear." Thesis, Aston University, 2003. http://publications.aston.ac.uk/9651/.

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Contact lenses have become a popular method of vision correction for millions of people globally. As with all devices designed for use within the body, interactions occur between the implanted material and the surrounding biological fluid. A common complaint of lens wearers is that they often experience symptoms of dry eye whilst wearing lenses. This sensation is often heightened towards the end of the day. Through the course of this study, various analytical techniques have been utilised including one dimensional electrophoresis and Western Blotting to study the protein profiles of tear sampl

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16

Szczotka-Flynn, Loretta B. "The Longitudinal Analysis of Silicone Hydrogel Contact Lens Study." Case Western Reserve University School of Graduate Studies / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=case1257182345.

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17

Grey, C. P. "Changes in contrast sensitivity during soft contact lens wear." Thesis, University of Bradford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376712.

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18

Holguin, Colorado Luisa Fernanda. "Impact of contact lens wear on conjunctival goblet cells." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/98118/1/Luisa%20Fernanda_Holguin%20Colorado_Thesis.pdf.

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Up to fifty percent of contact lens wearers discontinue from lens wear as a result of symptoms of dry eye. Using a high power confocal microscope specially adapted for examining the eye, the candidate observed that contact lens wear is associated with a reduction in the number of mucus-secreting conjunctival goblet cells, which means that the eye is less well lubricated, leading to discomfort during blinking. This discovery may pave the way towards developing strategies to avoid lens-induced discomfort, leading to more satisfied patients and saving the contact lens industry hundreds of million

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19

Olufayo, Oluwole Ayodeji. "Ultra-high precision machining of contact lens polymers." Thesis, Nelson Mandela Metropolitan University, 2015. http://hdl.handle.net/10948/3001.

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Contact lens manufacture requires a high level of accuracy and surface integrity in the range of a few nanometres. Amidst numerous optical manufacturing techniques, single-point diamond turning is widely employed in the making of contact lenses due to its capability of producing optical surfaces of complex shapes and nanometric accuracy. For process optimisation, it is ideal to assess the effects of various conditions and also establish their relationships with the surface finish. Presently, there is little information available on the performance of single point diamond turning when machining

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20

Dart, John Kenneth George. "Contact lens related ulcerative keratitis : epidemiology and pathogenesis." Thesis, University of Oxford, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.293396.

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21

Guillon, Jean-Pierre Charles François. "Tear film structure of the contact lens wearer." Thesis, City University London, 1987. http://openaccess.city.ac.uk/7955/.

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New techniques are proven in this thesis which allow the visual examination of the tear film on the cornea and on different types of contact lenses. The techniques are as follows: 1. A high magnification technique of photography using the biomicroscope and crossed polarised light, allows the measurement of tear film layer thicknesses and on the surface of rigid contact lenses and 'in vivo receding contact angle'. 2. A low magnification technique of photography allows the recording and the analysis of the superficial layers of the tear film over a wide area of the eye and contact lens surface.

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22

Young, Graeme. "New approaches to contact lens design and fitting." Thesis, Anglia Ruskin University, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.405097.

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23

Port, Michael John Anthony. "The application of ultrasound in contact lens metrology." Thesis, City University London, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.368028.

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24

Whitcombe, Una. "The effect of makeup on contact lens wear." Thesis, Aston University, 2016. http://publications.aston.ac.uk/33291/.

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Aim: the purpose of this thesis was to investigate the incidence of contact lens wear and makeup, to determine if any advice regarding lens insertion/makeup application could aid comfort. Method: A questionnaire of a student population at Aston University Optometry department and to patients attending branches of The Optic Shop, South Wales, was conducted to determine wearing patterns for contact lenses and makeup. Those who regularly wore make-up and contact lenses were invited to take part in a subjective study to investigate differences in the level of comfort between inserting lenses befor

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25

Heideman, Kyle C., and John E. Greivenkamp. "Low-coherence interferometer for contact lens surface metrology." SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS, 2016. http://hdl.handle.net/10150/621479.

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Contact lens performance depends on a number of lens properties. Many metrology systems have been developed to measure different aspects of a contact lens, but none test the surface figure in reflection to subwavelength accuracy. Interferometric surface metrology of immersed contact lenses is complicated by the close proximity of the surfaces, low surface reflectivity, and instability of the lens. An interferometer to address these issues was developed and is described here. The accuracy of the system is verified by comparison of glass reference sample measurements against a calibrated commerc

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26

Walline, Jeffrey Jay. "The contact lens and myopia progression (clamp) study /." The Ohio State University, 2002. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486546889380302.

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27

Nagapatnam, Subbaraman Lakshman. "Lysozyme Deposition Studies on Silicone Hydrogel Contact Lens Materials." Thesis, University of Waterloo, 2005. http://hdl.handle.net/10012/1245.

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Over 60 proteins have been detected in the tear film and among these lysozyme has attracted the greatest attention. Several techniques for elucidating the identity, quantity and conformation of lysozyme deposited on soft contact lenses have been developed. Lysozyme also deposits on the newly introduced silicone hydrogel (SH) lens materials, but in extremely low levels compared to conventional hydrogel lenses. Hence, a major analytical complication with the study of the SH contact lens materials relates to the minute quantity of deposited lysozyme. The first project of this thesis

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28

Keay, Lisa Jane Optometry &amp Vision Science Faculty of Science UNSW. "Public health impact of contact lens related microbial keratitis." Awarded by:University of New South Wales. School of Optometry and Vision Science, 2006. http://handle.unsw.edu.au/1959.4/26307.

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This thesis describes the impact of contact lens-related microbial keratitis in terms of incidence and severity. Disease outcome is defined by visual outcome, costs to the healthcare system, costs to the individual and duration of disease. A successful 12-month surveillance study was conducted of the populations of Australia and New Zealand to detect all cases of contact lens-related microbial keratitis. A random telephone survey of 32,000 households in Australia and 7,500 in New Zealand accurately determined the level of use of various contact lenses in the community. The impact of new c

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29

Korsan, Jenna M. "Soft Multifocal Contact Lenses for Myopia Control in Children." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1429012620.

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30

Mehta, Prina. "Advanced engineering of contact lens coatings using electrohydrodynamic atomization." Thesis, De Montfort University, 2018. http://hdl.handle.net/2086/17476.

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While the eye presents numerous opportunities for drug delivery (DD); there are many challenges met by conventional methods. Despite the exponential growth in research to overcome these downfalls and achieve sustained and controlled DD, the anatomical characteristics of the eye still pose formulation challenges. The research presented in this thesis utilises Electrohydrodynamic Atomization (EHDA) to engineer novel coatings for ocular contact lenses. EDHA was selected to develop coatings for the delivery of timolol maleate (TM); with the intention of achieving sustained drug release for treatme

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31

Carnell, Sarah. "Surfactant interaction and persistence at the contact lens surface." Thesis, Aston University, 2015. http://publications.aston.ac.uk/37488/.

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The interaction of poloxamer and poloxamine (Pluronic® and Tetronic®) surfactants with hydrogel and silicone hydrogel contact lens surfaces is of interest for this thesis. The persistence of surfactant molecules at the lens surface can indicate how long the surface has been modified. It is therefore important to observe and characterise the surface and surfactant behaviour separately. Characterisation of the contact lenses was carried out through dehydrated sessile drop measurements and surface energy calculations. Silicone-containing materials tended to be most hydrophobic regardless of water

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32

Tyagi, Garima. "Ocular surface changes with short-term contact lens wear." Thesis, Queensland University of Technology, 2011. https://eprints.qut.edu.au/49758/1/Garima_Tyagi_Thesis.pdf.

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Contact lenses are a common method for the correction of refractive errors of the eye. While there have been significant advancements in contact lens designs and materials over the past few decades, the lenses still represent a foreign object in the ocular environment and may lead to physiological as well as mechanical effects on the eye. When contact lenses are placed in the eye, the ocular anatomical structures behind and in front of the lenses are directly affected. This thesis presents a series of experiments that investigate the mechanical and physiological effects of the short-term use o

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33

Miller, Karina Y. "Contact Lens, Academics and Self-Perception Study: Follow-up Results." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1586881377813119.

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34

Alzahrani, Yahya A. "In vivo assessment of inflammatory cells in contact lens wearers." Thesis, Queensland University of Technology, 2016. https://eprints.qut.edu.au/93576/1/Yahya_Alzahrani_Thesis.pdf.

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Dissatisfaction with, and discontinuation from, contact lens wear is a source of major frustration and inconvenience to users, and a problem that is thought to cost the contact lens industry hundreds of millions of dollars each year. By directly and non-invasively monitoring inflammatory cells in the tissues at the front of the eye in symptomatic and asymptomatic lens wearers, the candidate has been able to demonstrate an inflammatory basis for contact lens discomfort. This finding may pave the way towards the development of strategies to make contact lenses more safe and afford greater levels

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35

Haddad, Mera. "In vitro and in vivo investigation of contact lens wettability." Thesis, University of Manchester, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.518475.

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36

Cai, Feng. "Evaluation of the mechanism of hypersensitivity to contact lens preseratives." Thesis, McGill University, 1988. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=61754.

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37

Poey, S. M. "Infrared thermography of the anterior eye during contact lens wear." Thesis, University of Manchester, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.494480.

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38

Shirafkan, Abbas. "Wettability and hydrophilicity of rigid and soft contact lens surfaces." Thesis, City University London, 1997. http://openaccess.city.ac.uk/8385/.

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In the last two decades an abundance of contact lens materials with unknown surface properties have been introduced as well as new contact lens design. Recent studies have identified the importance of physical and chemical interactions between materials and liquids. The purpose of this experimental research work was to investigate the relationship between a contact lens surface and a liquid. The wettability and hydrophilicity of both soft and rigid contact lens surfaces were determined using two novel techniques and an established method. The two novel techniques were the un-separated adherent

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39

Booysen, Dirk. "Tonometry and biomechanics of the cornea in contact lens wear." Thesis, Aston University, 2016. http://publications.aston.ac.uk/30151/.

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Aims: Research on use of contact lenses as drug delivery systems continues. Disposable lenses are often used to treat corneal injuries. Accurate intraocular pressure (IOP) measurements with lenses in situ will enhance patient care and save valuable chair time. Inter- and intraobserver reliability of rebound tonometer (RBT) and intraobserver reliability of ocular response analyser (ORA) with and without contact lenses of 50 (15 male, 35 female) healthy well adapted contact lens wearers between 18 – 55 years (M = 38.90, SD = 9.23) were examined. Clinical comparisons of IOP measurements with ORA

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40

Greiner, Katie Lynn. "Quality of Life of Pediatric Bifocal Soft Contact Lens Wearers." The Ohio State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=osu1243463393.

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41

Yaquinto, Brennen Ritter Yaquinto. "Rapid Pointing Performance Comparison between Spectacle and Contact Lens Wear." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1522243382611988.

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42

Pearce, E. I. "Analytical techniques for the study of soft contact lens spoilation." Thesis, Aston University, 1991. http://publications.aston.ac.uk/9761/.

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Soft contact lens wear has become a common phenomenon in recent times. The contact lens when placed in the eye rapidly undergoes change. A film of biological material builds up on and in the lens matrix. The long term wear characteristics of the lens ultimately depend on this process. With time distinct structures made up of biological material have been found to build up on the lens. A fuller understanding of this process and how it relates to the lens chemistry could lead to contact lenses that are better tolerated by the eye. The tear film is a complex biological fluid, it is this fluid tha

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43

Gallagher, A. "A novel peptide hydrogel for an antimicrobial bandage contact lens." Thesis, University of Liverpool, 2017. http://livrepository.liverpool.ac.uk/3016353/.

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Introduction: Corneal bandage lenses could have an important role to play in the treatment of corneal infection and disease. The application of bandage contact lenses for corneal ulcers are of interest as current treatment involves the topical administration of antibiotics, of which only 1 - 7% is absorbed to the site of infection. This inefficiency allows a lot of scope to improve the delivery of drugs to the surface of the eye. This study aimed to investigate the natural antimicrobial activity of a novel hydrogel as well as observing differences in activity when compounds such as additional

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44

Gifford, Kate L. "Binocular visual function in orthokeratology contact lens wear for myopia." Thesis, Queensland University of Technology, 2018. https://eprints.qut.edu.au/116154/1/Kate_Gifford_Thesis.pdf.

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Orthokeratology (OK) contact lenses have shown propensity for slowing down the worsening of myopia in children and young adults, with only some understanding of the mechanism. This thesis examined eye muscle coordination and focussing in OK contact lens wear; outcomes were consistent with a lower myopia progression risk and improved visual comfort compared to standard spectacles and soft contact lenses. These findings have relevance for patient acceptance, clinical management protocols and understanding OK's optical impact on the visual system of the young myope.

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45

FOSSATI, Edoardo. "Symplectic fillings of virtually overtwisted contact structures on lens spaces." Doctoral thesis, Scuola Normale Superiore, 2020. http://hdl.handle.net/11384/90719.

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Symplectic fillings of standard tight contact structures on lens spaces are understood and classified. The situation is different if one considers non-standard tight structures (i.e. those that are virtually overtwisted), for which a classification scheme is still missing. In this work we use different approaches and employ various techniques to improve our knowledge of symplectic fillings of virtually overtwisted contact structures. We study curves configurations on surfaces to solve the problem in the case of a specific family of lens spaces. Then we give general constraints on the top

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46

Murphy, Paul J. "An examination of human corneal sensitivity by non-invasive methods." Thesis, Glasgow Caledonian University, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.336652.

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The aim of this thesis was to design, develop and evaluate a Non-Contact Corneal Aesthesiometer (NCCA), using a controlled pulse of air, of a pre-determined pressure. First, the system design and alterations are described, then in a series of model experiments, the standardisation and characteristics of the air-pulse were examined. These studies revealed that the NCCA could produce a repeatable stimulus of known volume and rate of air-flow. Furthermore, the air-flow exiting the stimulus air jet was of a laminar shape, with minimal dispersion. The control of the air-flow dispersion was further

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47

Cyrus, Crystal Dawn. "Synthesis and Formulation of Novel Polymers for the Design of Extended Wear Contact Lens Materials and Surfaces." University of Akron / OhioLINK, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=akron1239637443.

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48

Savini, Alessio. "Fibered knots and links in lens spaces." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7269/.

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La tesi propone alcuni esempi di link fibrati in spazi lenticolari. Sfruttando la compatibilità fra le mosse di chirurgia intera e la nozione di open book decomposition, si ricava un esempio di link fibrato prima in L(p,1), per poi generalizzarlo a L(p,q). Si conclude determinando una struttura di contatto equivalente alla open book relativa agli spazi del tipo L(p,1).

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49

Ingverud, Tobias. "Polymerization of Zwitterionic Sulphobetaine Methacrylate and Modification of Contact Lens Substrate." Thesis, KTH, Skolan för kemivetenskap (CHE), 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-221638.

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In this study, the zwitterionic monomer [2-(methacryloyloxy)ethyl] dimethyl-(3-sulfopropyl) ammonium hydroxide (SBMA) was polymerized in a controlled manner by reversible addition-fragmentation chain transfer (RAFT) polymerization. The SBMA was also polymerized by atom transfer radical polymerization (ATRP) but in a less controlled manner why ATRP was discarded for further use in the study. The RAFT polymerized p(SBMA) was end-group modified through aminolysis forming a thiol end-group. The zwitterionic polymers have considerable anti-fouling properties and could be of use in contact lenses to

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50

Thai, Lee Choon. "Profiling the changes in the tear physiology with contact lens wear." Thesis, Glasgow Caledonian University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443226.

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The aim of these studies was to investigate the longitudinal physiological effects of contact lens wear on the tear film. This differed from previous studies which have explored the effect of contact lens wear by looking at tear physiology at particular phases of lens wear. A series of investigations were designed to examine the effect of contact lens wear on neophytes in the initial period, during wear and following the cessation of contact lens use. The studies scrutinised the biophysical changes, by evaluating the structure, production, evaporation rate, stability and osmolality, and the pr

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