Eye Chart for Eye Care Professionals is an Android app developed by Qiang Ye that lets you test your client's visual acuity anywhere and anytime. This free app allows you to calibrate the optotype size based on the test distance and target visual acuity value. You can also define your own test distance from 30cm to 20 feet continuously, using the distance unit of meter, feet, centimeter, or inch.

This app provides different optotypes such as E, C, Sloan, and Picture, and you can choose your favorite display type of an eye chart from a full display, horizontal, vertical, or cross one. You can save all these configurations to a scenario for quick access. Moreover, you can write a visual acuity record for your client or patient at any time and manage your record history. If you need an ETDRS eye chart, this app has it integrated as well.

Eye Chart for Eye Care Professionals is an excellent tool for eye care professionals and enthusiasts. The app is easy to use, and the calibration procedure is straightforward. You can contact the author for any suggestions, making it a useful app for both professionals and patients.