Browsing Optometry and Vision Science by Subject "Vision Science"
Now showing items 21-40 of 70
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Effect of vergence adaptation and positive fusional vergence training on oculomotor parameters
(University of Waterloo, 2008-01-24)Accommodation and vergence, the two important oculomotor systems, exhibit the property of adapation which maintains the response for comfortable prolonged viewing. Several mathematical models have been developed to describe ... -
Evaluation of a Novel Glycoprotein on Commercial Contact Lenses
(University of Waterloo, 2015-05-22)PURPOSE The purpose of this thesis was to evaluate the interaction of a novel glycoprotein, known as proteoglycan 4 (PRG4), with various commercial contact lenses. METHODS PRG4 was investigated for its effects on ... -
The evaluation of bulbar redness grading scales
(University of Waterloo, 2010-01-12)The use of grading scales is common in clinical practice and research settings. A number of grading scales are available to the practitioner, however, despite their frequent use, they are only poorly understood and may be ... -
Fixational eye movements in strabismic amblyopia
(University of Waterloo, 2013-04-29)Purpose: To test the hypothesis that the fixational stability (FS) of the amblyopic eye (AME) in strabismics will improve when binocular integration is enhanced through ocular alignment and inter-ocular suppression is ... -
Gaze strategies for coping with glare under intense contra light viewing conditions – A pilot study
(University of Waterloo, 2011-09-30)Purpose: This is a pilot study to investigate gaze strategies for coping with glare when performing a simple visual task under intense contra light viewing conditions. Method: Twenty-four normally sighted participants ... -
Image Restoration Methods for Retinal Images: Denoising and Interpolation
(University of Waterloo, 2015-04-27)Retinal imaging provides an opportunity to detect pathological and natural age-related physiological changes in the interior of the eye. Diagnosis of retinal abnormality requires an image that is sharp, clear and free of ... -
Impact of in vitro Tear Film Composition on Lysozyme Deposition and Denaturation
(University of Waterloo, 2012-08-31)Purpose To study the impact of lactoferrin and lipids on the kinetic deposition and denaturation of lysozyme on contact lens materials. Methods The contact lenses investigated in this thesis included two silicone ... -
Impact of Light Scatter on the Assessment of Retinal Arteriolar Hemodynamics
(University of Waterloo, 2010-04-29)Introduction and Purpose: Vascular pathologies play an important role in the etiology and progression of number of ocular diseases. Many instruments are developed to monitor retinal hemodynamics, including the Canon Laser ... -
Impact of Wavefront-Guided Laser in situ Keratomileusis on Monochromatic Higher Order Aberrations and Vision
(University of Waterloo, 2008-07-04)Wavefront-guided (WFG) laser in situ keratomileusis (LASIK) differs from conventional surgery by applying a refined algorithm for tissue removal, based on information from preoperative wavefront aberration data. Since the ... -
In vitro analysis of wettability and physical properties of blister pack solutions of hydrogel contact lenses
(University of Waterloo, 2010-04-30)Contact lens success is primarily driven by comfort of the lens in eye. Over the years, many modifications have been made to the lens surface and bulk material to improve comfort of the lens, however 50% of contact lens ... -
In Vitro Competitive Binding of Major Tear Proteins to Contact Lenses
(University of Waterloo, 2013-09-27)Purpose To study the impact of incubation solution complexity on protein deposition to silicone hydrogel (SH) contact lenses and the effect of contact lens cleaning solutions on protein activity and removal. Methods The ... -
Investigating The Impact of Multipurpose Solutions Released From Silicone Hydrogel Lenses on Corneal Epithelial Cells, in vitro
(University of Waterloo, 2010-01-22)Cytotoxicity of Multi-Purpose Solutions (MPS) is commonly tested on cells using diluted MPS or extracts from MPS soaked contact lenses. There is evidence that lens type will affect uptake and release of compounds contained ... -
An Investigation into the Effect of Increasing Target Size for Visual Sensitivity Measurement in Normals and in Early Glaucoma
(University of Waterloo, 2014-09-02)The clinical standard method of measurement for clinical visual sensitivity is currently Standard Automated Perimetry with a size III target (SAP III). However, there are many factors that can make the results unreliable. ... -
An investigation of interocular suppression with a global motion task
(University of Waterloo, 2012-10-31)Abstract Purpose: Interocular inhibitory interactions appear to underlie the establishment of ocular dominance. The inhibitory effect leads to suppression of the non dominant eye in certain conditions. While these ... -
The Investigation of Tear Film Osmolality as a Clinical Instrument Used in Assessments of the Tear Film and Dry Eye Disease
(University of Waterloo, 2010-01-11)Introduction: Tear film osmolality is a product of the varying concentrations of dissolved solutes (proteins, lipids and mucins) in the tear fluid. Research suggests that a hyperosmotic tear film is a trait common to ... -
Lagrange: A Three-dimensional Analytic Lens Design Method for Spectacles Application
(University of Waterloo, 2014-01-02)Purpose: traditional optical design is a numerical process based on ray tracing theory. The traditional method has the limitation of the application of the spectacle lens because of the necessity of initial configurations ... -
Longitudinal impact of newly acquired closed-circuit televisions (CCTV) on quality of life for low vision patients
(University of Waterloo, 2007-08-09)Ongoing efforts to quantify changes in quality of life attributable to low vision rehabilitation have focused on the utility of a single test instrument to measure this multidimensional concept. It is hypothesized that ... -
Low Vision Service Provision by Optometrist: A Nationwide Survey
(University of Waterloo, 2014-01-29)Purpose: The prevalence of age-related visual impairment is projected to increase as the Canadian population ages. As a result, the demand for low vision service is also projected to increase. However, there is a lack ... -
MKH-Haase Charts of Binocular Vision Measurements: Repeatability and Validity of Associated Phoria and Stereotests
(University of Waterloo, 2014-01-29)Abstract Introduction: H.J.-Haase developed a systematic set of tests for evaluating binocular vision called the Pola Test. The Pola Test measures associated phoria and stereoacuity at distance and near using a variety ... -
Modeling In Vitro Lipid Deposition on Silicone Hydrogel and Conventional Hydrogel Contact Lens Materials
(University of Waterloo, 2012-01-12)Purpose: To examine the variables that influence lipid deposition on conventional and silicone hydrogel contact lens materials and to build a physiologically relevant in vitro model of lipid deposition on contact lenses. ...