Accuracy of Augmented RealityBased Visual Acuity Measurement

Azinda Morrow

Abstract

Purpose: In recent years, eyecare-specific applications have been developed to allow patients to monitor for metrics such as visual acuity (VA) at home. Many of these technologies are being utilized by contact lens retailers and similar online commercial entities, rather than by practitioners. It is necessary to investigate these

Methods: for their accuracy as eyecare continues to expand and as practitioners consider incorporating telemedicine into their modes of practice. Our study compared distance VA

Results: from a traditional digital in-office system to that of a novel augmented reality (AR) system.

Methods: Subjects were asked to complete a survey regarding their demographics, ocular history, practice modality, and impressions of telemedicine. Distance VA was measured at a pre-measured ten foot test distance with the Smart System (M&S Technologies, Skokie, IL) with single presentation Landolt C optotypes presented on a laptop screen (Hewlett-Packard, Palo Alto CA). The patient was then given an iPad (V.5 Apple, Cupertino CA) loaded with the novel AR application, Vision Screen (Ver. 2019, EyecareLive [formerly CoolDoctors Inc.], Santa Clara CA). The application guided subjects to a presumed ten foot test distance from the laptop, determined by the AR measurement system. The software notified the subject when the test distance was reached and prompted the subject to obtain their VA. The actual test distance was measured for accuracy after data collection was complete. This study utilized data from only the right eye in both

Methods:, aided and unaided.

Results: 287 subjects were enrolled. The average aided logMAR visual acuity was -0.04±0.11 with the M&S system and +0.09±0.15 with the Vision Screen AR system; this difference was 0.13 (p < 0.001). The average test distance as guided by the AR system was 130.3±12.3 inches, an average of ten inches longer than the intended ten feet (120 inches). 52% of subjects either somewhat or strongly agreed that telemedicine could be useful in measuring visual acuity. Another 28% were neutral.

Results: The AR-based method of measuring visual acuity showed an average reduction of 1 line and 1.5 letter compared to the M&S System. Only 0.035 logMAR, approximately 2 letters, is accounted for by the additional ten inches in test distance measured by the AR system. This data indicates that there can be discrepancies between data collection at-home versus in-office. Normalizing these two systems, or at a minimum understanding the underlying cause for discrepancy and appropriate adjustment, is critical to this technology being useful and safe for at-home monitoring. Further research and development of these remote technologies is necessary to allow for improved accuracy and reliable data collection.

Details

Year: 2020

Program Number: 205032

Resource Type: Scientific Program

Author Affiliation: SUNY College of Optometry

Co-Authors: John Gelles, Stephanie Fromstein, Annie Lee, Colton Heinrich, Justin Kwan

Co-Author Affiliation: The Cornea & Laser Eye Institute, Illinois College of Optometry, South Pasadena Optometric Group, Clark EyeCare Center, CooperVision, Inc.

Room: Track 1