Optometry and Vision Science: Recent submissions
Now showing items 21-40 of 219
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Prevalence of Convergence Insufficiency-Type Symptomatology in Parkinson’s Disease
(Cambridge University Press, 2017-09)Background: Individuals with Parkinson’s disease (PD) often present with visual symptoms (e.g., difficulty in reading, double vision) that can also be found in convergence insufficiency (CI). Our objective was to estimate ... -
Motion Processing of Reverse Phi
(University of Waterloo, 2019-11-18)Introduction: When the contrast of the successive images is reversed for a target in an apparent motion stimulus, the perceived direction is reversed, i.e., opposite of phi motion, which is an integration of the sequential ... -
Protocol development for reliable isolation of tear-film neutrophils and in vitro functionality testing
(University of Waterloo, 2019-09-19)During prolonged eye closure, such as during sleep, leukocytes are recruited to the ocular surface, with polymorphonuclear neutrophils (PMNs) representing the largest population. PMNs are essential inflammatory cells ... -
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 ... -
Is blur sensitivity altered in children with progressive myopia?
(Elsevier, 2019-01)School aged children with progressive myopia show large accommodative lags to blur only cue which is suggestive of a large depth of focus (DOF). While DOF measures are lacking in this age group, their blur detection and ... -
Psychophysical Studies Of Motion Perception In Autism Spectrum Disorders
(University of Waterloo, 2019-05-23)Introduction Studies have shown considerable evidence of visual dysfunction in Autism Spectrum Disorders (ASD). Motion perception research in ASD reports a superior performance in processing motion information of fine ... -
Comparative Clinical Performance of Scleral Lenses with Varying Limbal Clearance in a Keratoconic Population
(University of Waterloo, 2019-05-10)PURPOSE The purpose of this study is to investigate the impact varying the limbal clearance (LC) has on the clinical performance of scleral lenses and the levels of inflammatory mediators in the tear film of keratoconic ... -
Assessment of ocular aberrations at scaled pupil size and reduced Shack-Hartmann spot number
(University of Waterloo, 2019-05-07)Wavefront aberrations describe the optical imperfections of the eye by measuring the complete refractive elements of the eye. However, the reliability of ocular aberration is uncertain under some challenges and issues. ... -
Aspects of Corneal Fluorescein Staining
(University of Waterloo, 2019-04-25)PURPOSE Evaluating the cornea for epithelial fluorescein staining is a key element of the ocular examination of contact lens wearers and people with dry eye disease. It has long been viewed as a method of visualizing a ... -
Visual Functions in Post-Concussion Syndrome
(University of Waterloo, 2018-10-24)Purpose: Post-concussion syndrome (PCS) is a is a complex neurological disorder in which various concussion symptoms can last for weeks, months, or even years after sustaining the concussion. The PCS population has been ... -
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 ... -
Post Stroke Visual Midline Shift Syndrome
(University of Waterloo, 2018-10-01)Abstract Introduction The definition of an individual’s visual midline is the point which the individual perceives as being straight-ahead or “in front of their nose”. One of the perceptual consequences of a stroke for ... -
The Association between Visual Attention and Body Movement-Controlled Video Games, Balance and Mobility
(University of Waterloo, 2018-09-21)Purpose: Interactive video virtual-reality body movement games such as Xbox Kinect may have potential for training visual attention and physical fitness concurrently in older adults in order to reduce the risk of falls. ... -
Investigating the Effect of Mild TBI on the Global Processing of Form and Motion
(University of Waterloo, 2018-09-10)Purpose: Individuals with mild traumatic brain injury (TBI) often experience a range of visual symptoms. The cortical processing of visual information involves two parallel streams; the ventral stream (form perception) and ... -
Developing algorithms for the analysis of retinal Optical Coherence Tomography images
(University of Waterloo, 2018-09-04)Vision loss, with a prevalence loss greater than 42 million in the United States is one of the major challenges of today's health-care industry and medical science. Early detection of different retinal-related diseases ... -
Automated Segmentation of Retinal Optical Coherence Tomography Images
(University of Waterloo, 2018-08-21)Aim. Optical Coherence Tomography (OCT) is a fast and non-invasive medical imaging technique which helps in the investigation of each individual retinal layer structure. For early detection of retinal diseases and the study ... -
Relationship between vessel diameter and depth measurements within the limbus using ultra-high resolution optical coherence tomography
(Elsevier, 2018-01-01)Purpose To establish a relationship between the diameter and depth position of vessels in the superior and inferior corneo-scleral limbus using ultra-high resolution optical coherence tomography (UHR-OCT). Methods Volumetric ... -
Visual Functions in Parkinson’s Disease
(University of Waterloo, 2018-06-19)Background: Freezing of gait (FOG) is considered to be a motor disorder symptom that affects some Parkinson Disease (PD) patients; however, it is hypothesized that sensory systems may also be involved in FOG. Purpose: ... -
Assessment of Current and Next Generation of Colour Vision Tests for Occupational Use
(University of Waterloo, 2018-06-19)Introduction: Individuals with congenital colour vision deficiencies are at a greater risk of making an error in colour judgment. Computerized colour vision tests are now available to screen for colour vision defects and ...