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Updated: Mar 10, 2026

Author Spotlight: An Automated Method for Assessing Visual Acuity in Infants and Toddlers Using an Eye-Tracking System
Published on: March 17, 2023
Correcting Finger Counting to Snellen Acuity
Rustum Karanjia1, Tiffany Jean Hwang2, Alexander Francis Chen2
1Doheny 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.
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.

