Browsing Optometry and Vision Science by Title
Now showing items 228-247 of 249
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The TFOS International Workshop on Contact Lens Discomfort: Introduction
(Association for Research in Vision and Ophthalmology, 2013-10-18)For many years, the contact lens field had focused on safety associated with contact lens wear—and for good reason, given the lack of understanding of the risk factors and etiology of serious complications such as microbial ... -
The TFOS International Workshop on Contact Lens Discomfort: Report of the Contact Lens Interactions With the Ocular Surface and Adnexa Subcommittee
(Association for Research in Vision and Ophthalmology, 2013-10-18)The report of this subcommittee concerns the impact of contact lenses (CLs) on the ocular surface, with a particular emphasis on CL discomfort (CLD). We define the ocular surface, its regional anatomy, and the physiological ... -
The TFOS International Workshop on Contact Lens Discomfort: Report of the Contact Lens Materials, Design, and Care Subcommittee
(Association for Research in Vision and Ophthalmology, 2013-10-18)Examining the role of the contact lens material, design, and the care system is fundamental to understanding contact lens discomfort (CLD). However, a systematic review that tries to determine the governing factors is ... -
Time Course of Dichoptic Masking in Normals and Suppression in Amblyopes
(Association of Research in Vision and Ophthalmology, 2014-07)Purpose.: To better understand the relationship between dichoptic masking in normal vision and suppression in amblyopia we address three questions: First, what is the time course of dichoptic masking in normals and amblyopes? ... -
Topical anaesthetic use prior to rigid gas permeable contact lens fitting
(Elsevier, 2017-07-11)Purpose To investigate effect of topical anaesthetic (TA) during gas permeable (GP) contact lens (CL) fitting on subjective and objective measures of patient anxiety. Methods 47 subjects (mean ± sd age = 26.9 ± 4.9 ... -
Total Retinal Blood Flow and Retinal Oxygen Saturation in the Major Retinal Vessels of Healthy Participants
(University of Waterloo, 2013-09-27)Introduction: Oxygen delivery, or utilization, is a function of retinal blood flow and blood oxygen saturation. The retinal pigment epithelium (RPE), in particular, has been shown to have the highest levels of metabolic ... -
Towards point-of-care detection of polymicrobial infections: Rapid colorimetric response using a portable spectrophotometer
(Elsevier, 2016-09)Infectious diseases spread rapidly because current diagnostic methods are slow, expensive, and require technical expertise. Biosensors have recently been used as devices that can be deployed at the point-of-care for rapid ... -
Toxicity of Ophthalmic Solutions, Benzalkonium Chloride and UV Radiation on Human Corneal Epithelial Cells in vitro
(University of Waterloo, 2015-06-12)The purpose of this work was to develop a sensitive in vitro method for ocular toxicity testing; and to use this method to assess the individual and combined effects of ophthalmic solutions, benzalkonium chloride (BAK), ... -
Type 2 diabetes mellitus and the prevalence of age-related cataract in a clinic population.
(University of Waterloo, 2012-01-24)Purpose: The prevalence of diabetes (DM) is increasing globally with type 2 diabetes (T2DM) being primarily responsible for this alarming trend. Age and DM have been associated with an increased prevalence of AR cataract ... -
Ultraviolet B and blue light - induced phototoxic effects on retinal pigment epithelium using in vitro assays
(University of Waterloo, 2008-09-12)It is well known that ultraviolet (UV) B (280-315 nm) and blue light (400-500 nm) radiation can produce phototoxic lesions in the neural retina and the retinal pigment epithelium (RPE). In the first section of this thesis, ... -
Understanding concussion in para athletes with vision impairment
(University of Waterloo, 2023-02-15)Sports-related concussions occur in para sport as they do in able-bodied sport. There is evidence to suggest athletes with vision impairment (VI) may be more likely to sustain concussion injuries compared to athletes with ... -
Understanding the mechanisms of flicker defined form processing
(University of Waterloo, 2009-01-15)Flicker defined form (FDF) is a temporally-dependent illusion created by the counterphase flicker of randomly positioned element dots, that preferentially stimulates the magnocellular system. Previous studies have found ... -
Understanding the Mechanisms Underlying Brain Plasticity in Adult Humans
(University of Waterloo, 2017-09-22)Purpose: The human brain changes signi cantly with age. The plasticity of the visual cortex is thought to decrease into adulthood while childrens' brains are highly plastic. This change in plasticity is thought to be due, ... -
Understanding the sensory and motor behavior of accommodation in progressive myopic children
(University of Waterloo, 2017-09-27)Introduction: Accommodation and vergence, in unison, help in maintaining a clear and single binocular vision, a linchpin for normal vision development. Under natural viewing conditions, accommodation and vergence systems ... -
Unmasking the linear behaviour of slow motor adaptation to prolonged convergence
(Wiley, 2016-06)Adaptation to changing environmental demands is central to maintaining optimal motor system function. Current theories suggest that adaptation in both the skeletal-motor and oculomotor systems involves a combination of ... -
Uptake and release of preservatives from soft contact lens materials
(University of Waterloo, 2022-01-13)Purpose: The purpose of this thesis was to examine the uptake and release of myristamidopropyl dimethylamine (MAPD) and polyhexamethylene biguanide (PHMB) from soft contact lens material using various in vitro models to ... -
Use of OCT and Oculus Pentacam HR as Aids to Semi-Scleral Contact Lens Fitting
(University of Waterloo, 2013-09-03)Purpose: To determine whether semi-scleral contact lenses (sSCL) can be appropriately fitted using corneal sagittal depth measurements, and to determine the impact of fit on visual acuity, effect of time on topographic ... -
The Validation of a Novel Dynamic Visual Acuity Test, and Examination of the Effects of Different Factors on Dynamic Visual Acuity
(University of Waterloo, 2018-05-22)Purpose: When a target is in motion, two thresholds can be measured: dynamic visual acuity (DVA, the smallest target size at which an observer can resolve target detail) and speed threshold (the fastest target speed at ... -
Viability Profile of ex vivo Corneal Epithelial Cell Samples
(University of Waterloo, 2011-10-28)The corneal epithelium is a vital tissue which must retain its integrity to preserve vision and protect against harmful bacterial infections and other insults. Corneal disease represents the second most common cause of ... -
Visual correlates of balance and mobility in older adults: Can visual attention training improve performance?
(University of Waterloo, 2017-05-11)Falls among older adults is a serious problem facing our aging population. It is estimated that one in every three older adults aged 70+ fall every year; some of these experience multiple falls. Thirty five percent of ...