Conway, M. A.

Lingappa, L.

Satgunam, P.

Subramanian, A.

Sumalini, R.

City Research Online

              City, University of London Institutional RepositoryCitation: Satgunam, P., Sumalini, R., Subramanian, A., Conway, M. A. & Lingappa, L. (2022). Repeatability of grating acuity and contrast sensitivity in children with cerebral visualimpairment. Investigative Ophthalmology & Visual Science, 63(7), ISSN 0146-0404 This is the published version of the paper. This version of the publication may differ from the final published version. Permanent repository link:  https://openaccess.city.ac.uk/id/eprint/29380/Link to published version: Copyright: City Research Online aims to make research outputs of City, University of London available to a wider audience. Copyright and Moral Rights remain with the author(s) and/or copyright holders. URLs from City Research Online may be freely distributed and linked to.Reuse: Copies of full items can be used for personal research or study, educational, or not-for-profit purposes without prior permission or charge. Provided that the authors, title and full bibliographic details are credited, a hyperlink and/or URL is given for the original metadata page and the content is not changed in any way. City Research OnlineCity Research Online:            http://openaccess.city.ac.uk/            publications@city.ac.uk1/2Repeatability of grating acuity and contrast sensitivityin children with cerebral visual impairment | IOVSiovs.arvojournals.org/article.aspxOpen AccessARVO Annual Meeting Abstract  |   June 2022Repeatability of grating acuity and contrast sensitivity in children with cerebral visualimpairmentAuthor Affiliations & NotesInvestigative Ophthalmology & Visual Science June 2022, Vol.63, 3278 – A0330. doi:AbstractPurpose : Cerebral visual impairment (CVI) is a common cause of pediatric visualimpairment globally. Children with CVI can have additional developmental delays inareas such as motor, cognition and speech. The location/extent of brain damage,frequency of seizures, medication can all contribute to the variability of clinicalmeasurements in these children. Therefore it will be important to identify clinical toolswith good repeatability to monitor and manage this condition. In this study, we aimed todetermine the repeatability indices of 2 important clinical tests: grating acuity [Telleracuity cards (TAC), Peekaboo Vision app (PV)] and contrast sensitivity [Hiding Heidicards (HH) and Ohio contrast cards (OCC)] tests in children with CVI.Methods : A cross-sectional, prospective study was conducted on children with CVIvisiting a paediatric neurology clinic in Hyderabad, India. Informed written consent wastaken from parents. Grating acuity and contrast sensitivity tests were administered in arandomized sequence and testing time was recorded. Test-retest repeatability was carriedout within 3.5 months on average.Results : Thirty-two children (males: 22) with a mean age of 2.6±1.7 years (range: 9months to 6.8 years) were recruited. Significantly different acuities were obtained with PVand TAC (p<0.01, 95% limits of agreement (LoA): -0.67 to 0.33 logMAR). Teller acuitycards (Coefficient of Repeatability (CR): 0.3) had better repeatability when compared toPV (CR: 0.83). Testing time with both acuity tests was found to be comparable (p=0.76).Significantly different contrast sensitivities were obtained with HH and OCC (p=0.02,95% LoA: -0.31 to 0.47 logCS). Ohio contrast cards (CR: 0.32) had better repeatabilitywhen compared to HH (CR: 0.5). Significantly lesser time was taken to administer HHcompared to OCC (p<0.01).Conclusions : Repeatability was found to be better for TAC and OCC in measuringgrating acuity and contrast sensitivity respectively. Differences in thresholdingparadigms, number of cards depending on the step sizes measured and different types of2/2stimuli could be the possible reasons for poor agreement between the tests. Choice ofvisual function tests for children with CVI should consider the repeatability measure,especially for longitudinal follow-ups.This abstract was presented at the 2022 ARVO Annual Meeting, held in Denver, CO, May1-4, 2022, and virtually.This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.Advertisement  

Repeatability of grating acuity and contrast sensitivity in children with cerebral visual impairment

https://openaccess.city.ac.uk/id/eprint/29380/1/iovs.arvojournals.org-Repeatability%20of%20grating%20acuity%20and%20contrast%20sensitivity%20in%20children%20with%20cerebral%20visual%20impairment%20.pdf

Repeatability of grating acuity and contrast sensitivity in children with cerebral visual impairment

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