Browsing Waterloo Research by Author "Irving, Elizabeth L."
Now showing items 1-7 of 7
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Binocular Adaptation to +2 D Lenses in Myopic and Emmetropic Children:
Sreenivasan, Vidhyapriya; Irving, Elizabeth; Bobier, William (Wolters Kluwer, 2009-06)Purpose. To compare vergence adaptation to +2 D addition lenses in myopic and emmetropic children and to evaluate the influence of the accommodative-vergence crosslink (AC/A ratio) on this adaptation. Methods. Nine ... -
Binocular adaptation to near addition lenses in emmetropic adults
Sreenivasan, Vidhyapriya; Irving, Elizabeth; Bobier, William (Elsevier, 2008-05)Near addition lenses are prescribed to pre-presbyopic individuals for treatment of binocular motor problems such as convergence excess and to control the progression of myopia. To date, no investigation has looked at the ... -
Can current models of accommodation and vergence predict accommodative behavior in myopic children?
Sreenivasan, Vidhyapriya; Irving, Elizabeth; Bobier, William (Elsevier, 2014-08)Investigations into the progression of myopia in children have long considered the role of accommodation as a cause and solution. Myopic children show high levels of accommodative adaptation, coupled with accommodative lag ... -
Effect of heterophoria type and myopia on accommodative and vergence responses during sustained near activity in children
Sreenivasan, Vidhyapriya; Irving, Elizabeth; Bobier, William (Elsevier, 2012-03-15)The influence of phoria-type and myopia on changes to vergence and accommodation during prolonged near-task was examined in 53 children. Participants were classified into phoria and refractive categories based on near ... -
Effect of near adds on the variability of accommodative response in myopic children
Sreenivasan, Vidhyapriya; Irving, Elizabeth; Bobier, William (Wiley, 2011-03)Purpose: Higher variability of accommodative response (VAR) has been reported in myopes and speculated to be a possible risk factor for the progression of myopia. We investigated whether near adds of +2D and −2D were capable ... -
Inhibition of Defocus-Induced Myopia in Chickens
Woods, Jill; Guthrie, Sarah E.; Keir, Nancy; Dillehay, Sally; Tyson, Mark; Griffin, Richard; Choh, Vivian Cheng-Pei; Fonn, Desmond; Jones, Lyndon W.; Irving, Elizabeth (Association for Research in Vision and Ophthalmology, 2013-04-12)Purpose.: To determine the effect of wearing a lens with a unique peripheral optical design on the development and progression of defocus-induced myopia in newly hatched chickens.Methods.: Eighty-five newly hatched chickens ... -
Prevalence of Convergence Insufficiency-Type Symptomatology in Parkinson’s Disease
Law, Caroline; Chriqui, Estefania; Kergoat, Marie-Jeanne; Leclerc, Bernard-Simon; Panisset, Michel; Irving, Elizabeth L.; Postuma, Ronald B.; Chouinard, Sylvain; Kergoat, Hélène (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 ...