Correcting Finger Counting to Snellen Acuity

Rustum Karanjia; Tiffany Jean Hwang; Alexander Francis Chen; Andrew Pouw; Jack J Tian; Edward R Chu; Michelle Y Wang; Jeffrey Show Tran; Alfredo A Sadun

doi:10.1080/01658107.2016.1209221

Correcting Finger Counting to Snellen Acuity

Neuroophthalmology. 2016 Aug 22;40(5):219-221. doi: 10.1080/01658107.2016.1209221. eCollection 2016 Oct.

Authors

Rustum Karanjia¹, Tiffany Jean Hwang², Alexander Francis Chen², Andrew Pouw², Jack J Tian², Edward R Chu², Michelle Y Wang², Jeffrey Show Tran², Alfredo A Sadun³

Affiliations

¹ Doheny Eye Institute, Los Angeles, California, USA; Doheny Eye Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA; Ottawa Eye Institute, University of Ottawa, Ottawa, Canada; Ottawa Health Research Institute, Ottawa, Ontario, Canada.
² Doheny Eye Institute , Los Angeles, California, USA.
³ Doheny Eye Institute, Los Angeles, California, USA; Doheny Eye Center, David Geffen School of Medicine at UCLA, Los Angeles, California, USA.

Abstract

In this paper, the authors describe an online tool with which to convert and thus quantify count finger measurements of visual acuity into Snellen equivalents. It is hoped that this tool allows for the re-interpretation of retrospectively collected data that provide visual acuity in terms of qualitative count finger measurements.

Keywords: Count fingers; Snellen; visual acuity.