![]() While there are a few apps that fill the space, a recent study that investigated the accuracy of visual acuity by testing apps and assessed their usability for telehealth reported that most of the apps tested had large errors with the optotype and testing distance. This may be of particular concern for visual acuity assessments performed outside of an eye professional’s office. Due to variations in the recognition of different optotypes, attention of the subject, or other factors, individuals may misidentify certain optotypes above threshold while correctly identifying only some optotypes at threshold making final visual acuity determination difficult to interpret. The examiner administering the used test must decide which optotypes to display and its sequence. However, visual acuity screenings at schools, community settings, primary care offices, home testing, and even at eye doctor’s offices may often not be standardized. This typically involves a subjective assessment using a standard chart like Snellen, which has been replaced by LogMAR charts in most parts of the world. Keywords: EyeSpy 20/20, visual acuity, vision screening, smartphone screening, mobile visionĪssessment of visual acuity is an important component of any comprehensive eye examination or vision screening. The EyeSpy 20/20 visual acuity testing algorithm as tested with the desktop version was non-inferior to the gold standard e-ETDRS testing algorithm on a desktop platform, but statistically faster to implement when administered on the same electronic testing platform.Ĭonclusion: EyeSpy 20/20 is a promising tool for vision screening and visual acuity evaluation in children. Results: Hundred and ten children were recruited for the study. Bland–Altman analysis and correlation tests were done. Children were recruited for this study and tested between two different visual acuity measurement systems. Subjects were tested on a desktop version of the EyeSpy software for both the accuracy and duration of measurement of visual acuity and compared to a e-ETDRS chart in a randomized sequence. Methods: This study evaluates a desktop-based standardized vision testing algorithm (EyeSpy 20/20) specifically designed for use on mobile electronic platforms. Validated protocols such as the Early Treatment for Diabetic Retinopathy Study (ETDRS) are frequently employed by vision researchers to ensure accurate and repeatable visual acuity measurements. However, most vision assessments outside of research settings, including in doctor’s offices, rarely employ standardized protocols. Standardized vision testing protocols may help prevent testing inconsistencies resulting from variations in test administration and interpretation of different examiners. Balamurali Vasudevan, Joshua Baker, Caitlin Miller, Alicia FeisĪrizona College of Optometry, Midwestern University, Glendale, AZ, USAĬorrespondence: Balamurali Vasudevan, Tel +62, Email īackground: Visual acuity is a critical component of visual function assessment for all ages.
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