Browsing Optometry and Vision Science by Type "Master Thesis"
Now showing items 21-40 of 95
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Development and application of a new Attended Field of View (AFOV) test
(University of Waterloo, 2010-05-21)Purpose: An important challenge for eye care practitioners is meeting the needs of an ever-increasing elderly population. Standard vision tests are inadequate for determining performance in real life situations. One test ... -
Development of an in vitro eye model to better represent in vivo physiological conditions
(University of Waterloo, 2021-06-23)Purpose The purpose of this thesis was to optimize a novel in vitro blink model, the OcuBlink, to best mimic the physiological characteristics of the human eye. By improving this in vitro model, the results from in vitro ... -
Development of Form Visual Acuity in Infants Measured by Schematic Faces
(University of Waterloo, 2018-10-05)Purpose The purpose of this thesis was 1) to develop a test of visual acuity (VA) to measure recognition (form) acuity at a younger age than is currently clinically possible (3 years). Currently, it is only possible to ... -
Diabetic retinopathy grading with respect to the segmented lesions
(University of Waterloo, 2022-05-19)One of the leading causes of irreversible vision loss is Diabetic Retinopathy (DR). The International Clinical Diabetic Retinopathy scale (ICDRS) provides grading criteria for DR. Deep Convolutional Neural Networks (DCNNs) ... -
Doppler SD-OCT Blood Flow Analysis and Extraneous Operator Influences
(University of Waterloo, 2014-01-30)Purpose: The RTVue-100 is a new instrument for measuring retinal blood flow (RBF), but image quality needs to be optimized in order for valid blood flow results. The primary aim of this thesis was to assess the presence ... -
The Effect of Freezing on the Elution of PVA from Contact Lenses
(University of Waterloo, 2024-04-30)Contact lenses are widely used, with over 140 million wearers globally. Wearing contact lenses can cause symptoms of discomfort and dryness, which affect nearly half of all wearers. To address this concern, this thesis ... -
Effect of Reclining on Retinal Thickness in Diabetes
(University of Waterloo, 2015-01-20)Purpose: Previous studies have shown diurnal variation in retinal thickness in patients with diabetic macular edema (DME) over the course of the day but the cause, presence and magnitude of this variation is controversial. ... -
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 ... -
The Effects of 1-(5-Iodonaphthalene-1-sulfonyl)-1H-hexahydro-1,4-diazepine hydrochloride (ML-7) on the Lens During Avian Accommodation In Situ
(University of Waterloo, 2009-12-17)A previous study in chickens revealed that myosin light chain kinase (MLCK), f actin, and myosin are found on the crystalline lens. Their polygonal arrangement at the posterior surface resembles a muscle tissue, which ... -
Effects of ML-7 on the Actomyosin Networks of the Avian Crystalline Lens
(University of Waterloo, 2022-04-29)Assemblies of contractile proteins such as actin, myosin and myosin light chain kinase (MLCK) are found on the posterior surface of the lens fibre cells. The mechanical properties of chicken lenses, as well as their focal ... -
Effects of Temperature on the Proliferation of Human and Fish Lens Epithelial Cells
(University of Waterloo, 2019-08-29)Crystallins are proteins that confer refractive properties to the crystalline lens. All vertebrate lenses contain α- and β-crystallins, and often a third major crystallin. Crystallins can have additional non-refractive ... -
Estimation of Heading direction Using Optic Flow
(University of Waterloo, 2019-08-26)Background The purpose of this study was to investigate the effect of the reduction of the uniocular light luminance as well as the effect of unequal retinal image sizes by using uniocular size lenses, on the heading ... -
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 ... -
Explainable AI for retinal OCT diagnosis
(University of Waterloo, 2021-01-20)Artificial intelligence methods such as deep learning are leading to great progress in complex tasks that are usually associated with human intelligence and experience. Deep learning models have matched if not bettered ... -
Exploration of the Underlying Visual Perceptual and Cognitive Mechanisms of Dynamic Visual Acuity
(University of Waterloo, 2024-01-25)Purpose: Dynamic visual acuity (dynamic VA) is a complex, perceptual ability of the visual system that involves determining fine details of objects as they move across one’s field of view (1–4). Over the years, there has ... -
Fabrication of microfluidic chip using 3D printing for ocular cell studies
(University of Waterloo, 2023-09-25)Purpose: This thesis aimed to create a polydimethylsiloxane (PDMS) microfluidic chip utilizing low-cost commercial 3D printers and to integrate human corneal epithelial cells (HCEC) into the fabricated chip. Methods: The ... -
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 ... -
Immobilization of Gold Nanoparticles for Colourimetric and Ratiometric Refractive Index Sensing
(University of Waterloo, 2019-12-12)The development of refractive index sensors is an expanding field of research, with applications in fields including medical diagnostics, food safety and public health. Nanotechnology has become widely implemented in various ... -
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 ...