Longitudinal Evaluation of Vision Function in Children with Cortical Visual Impairment (CVI)

Abstract

Event Abstract Back to Event Longitudinal Evaluation of Vision Function in Children with Cortical Visual Impairment (CVI) Tonya Watson1* 1 University of California, Department of Vision Science, United States PURPOSE: Cortical visual impairment (CVI) is bilateral visual impairment caused by damage to the posterior visual pathway (optic radiations, visual cortex, or both). Current literature reports great variability in the prognosis of CVI. The purpose of this study was to evaluate change in vision function in patients with CVI using a quantitative assessment method. METHODS:Visual acuity and contrast sensitivity was assessed using the sweep VEP. 39 children participated in the visual acuity assessment and 34 of the 39 children participated in the contrast threshold assessment. At the time of the first VEP, the children ranged in age from 1 to 16 years (mean: 5.0 years). The time between measures ranged from 0.6 to 13.7 years (mean: 6.5 years). RESULTS: 49% of the children studied showed significant improvement of visual acuity. The average improvement was 0.43 log unit (20/205 to 20/76) in those who improved. The initial visual acuity was worse in those who improved compared to those who did not improve (p<0.001). 47% of the children studied showed significant improvement of contrast threshold. In those who improved, the average amount of improvement was 0.57 log unit (10% to 2.6% Michelson). The initial contrast threshold was significantly worse in those who improved (p=0.001). Also, the change in contrast threshold was related to age of the child (p=0.017). CONCLUSIONS: Significant improvement in vision can occur over time in some children with CVI. Further investigation is warranted to better understand the prognosis for visual recovery in individual children with CVI. Conference: Conference on Neurocognitive Development, Berkeley, CA, United States, 12 Jul - 14 Jul, 2009. Presentation Type: Oral Presentation Topic: Perception Citation: Watson T (2009). Longitudinal Evaluation of Vision Function in Children with Cortical Visual Impairment (CVI). Conference Abstract: Conference on Neurocognitive Development. doi: 10.3389/conf.neuro.09.2009.10.002 Copyright: The abstracts in this collection have not been subject to any Frontiers peer review or checks, and are not endorsed by Frontiers. They are made available through the Frontiers publishing platform as a service to conference organizers and presenters. The copyright in the individual abstracts is owned by the author of each abstract or his/her employer unless otherwise stated. Each abstract, as well as the collection of abstracts, are published under a Creative Commons CC-BY 4.0 (attribution) licence (https://creativecommons.org/licenses/by/4.0/) and may thus be reproduced, translated, adapted and be the subject of derivative works provided the authors and Frontiers are attributed. For Frontiers’ terms and conditions please see https://www.frontiersin.org/legal/terms-and-conditions. Received: 06 Jul 2009; Published Online: 06 Jul 2009. * Correspondence: Tonya Watson, University of California, Department of Vision Science, Berkeley, United States, twatson@berkeley.edu Login Required This action requires you to be registered with Frontiers and logged in. To register or login click here. Abstract Info Abstract The Authors in Frontiers Tonya Watson Google Tonya Watson Google Scholar Tonya Watson PubMed Tonya Watson Related Article in Frontiers Google Scholar PubMed Abstract Close Back to top Javascript is disabled. Please enable Javascript in your browser settings in order to see all the content on this page.