• Users Online: 88233
  • Home
  • Print this page
  • Email this page
ORIGINAL ARTICLE
Year : 2018  |  Volume : 66  |  Issue : 5  |  Page : 634-640

A standardized logarithm of the minimum angle of resolution visual acuity chart in Hindi


1 Department of Vision and Hearing Sciences, Anglia Ruskin University, Cambridge, CB1 1PT, United Kingdom; School of Optometry, National Institute of Ophthalmic Sciences, Tun Hussein Onn National Eye Hospital, 46200 Petaling Jaya, Selangor, Malaysia
2 Department of Vision and Hearing Sciences, Anglia Ruskin University, Cambridge, CB1 1PT, United Kingdom

Correspondence Address:
Dr. Ananth Sailoganathan
Department of Vision and Hearing Sciences, Anglia Ruskin University, Cambridge, CB1 1PT; National Institute of Ophthalmic Sciences, Tun Hussein Onn National Eye Hospital, Lorong Utara B, 46200, Petaling Jaya, Selangor

Login to access the Email id

Source of Support: None, Conflict of Interest: None


DOI: 10.4103/ijo.IJO_1074_17

Rights and Permissions

Purpose: The purpose of this study to develop and calibrate a new Hindi logarithm of the minimum angle of resolution (logMAR) visual acuity chart. Methods: A new Hindi visual acuity chart was designed to logMAR specifications using Hindi optotypes experimentally selected to have similar relative legibility under equivalent spherical and cylindrical defocus. The chart calibration study was carried out in a large clinical setup in India. Participants who were literate in English and Hindi participated in the study. Visual acuity was measured with the new Hindi logMAR chart and a modified ETDRS (m-ETDRS) logMAR chart. The method of presentation was randomized between the charts. Repeat visual acuity was measured on a subsequent day with a second version of the Hindi logMAR chart. Results: The Hindi logMAR chart correlated highly with the m-ETDRS logMAR chart (r2 = 0.92); however, the mean visual acuity difference (Hindi logMAR-m-ETDRS logMAR) was nearly one and half lines (0.13 logMAR, 95% confidence interval [CI] = ±0.15 logMAR). The Hindi logMAR chart also proved to be highly repeatable (r2 = 0.99; mean difference 0.005, 95% CI = ±0.04 logMAR). Conclusion: This study reports the first standardized visual acuity chart developed in Hindi incorporating equal letter legibility and logMAR chart design features. The Hindi logMAR visual acuity chart provides a valid and repeatable tool for the measurement of visual acuity in native Hindi language speakers. Future use of the new Hindi chart should incorporate an increase in optotype size of 0.13 logMAR.


[FULL TEXT] [PDF]*
Print this article     Email this article
 Next article
 Previous article
 Table of Contents

 Similar in PUBMED
   Search Pubmed for
   Search in Google Scholar for
 Related articles
 Citation Manager
 Access Statistics
 Reader Comments
 Email Alert *
 Add to My List *
 * Requires registration (Free)
 

 Article Access Statistics
    Viewed3656    
    Printed31    
    Emailed0    
    PDF Downloaded312    
    Comments [Add]    
    Cited by others 1    

Recommend this journal