VisionApp - Refraction and Presbyopia

Overview

Recent Android mobile device technology is available which allows user-measured refractive error and reading add power. This technology could be quite useful to the clinical and research community. The current study aims to evaluate the accuracy, repeatability, and reproducibility of one such technology by VisionApp, specifically with regard to refraction and presbyopia. VisionApp is an app which runs on a smartphone or other device which uses the distance between the user's face and the phone to determine refractive error, while the user looks at different targets (lines, letters, words, etc).

Subjects will be enrolled at the Clinical Optics Research Lab at Indiana University and complete a single study visit. At the study visit, demographic and health/ocular history may be collected by oral history and standard clinical testing including refraction (check of glasses prescription), auto-refraction or aberrometry may be performed. Visual acuity and room lighting checks may also be measured using standard clinical techniques. For the experimental portion of the study visit, the subject will look at a phone running the VisionApp program set at a particular distance (calibration) and then be instructed to move further from, or closer to the phone, until a given target (letter, lines, patterns, etc) are more or less clear. Each test may be repeated until at least 10 good data points are collected. This may be done on the right eye, left eye, or both eyes.

Conditions

Interventions

Eligibility

Locations (1)

Outcomes