专业视力检查 app for iPhone and iPad

A professional visual acuity test app developed by an ophthalmologist.

Main functions:
- compatible with both iPhone and iPad, free switch from portrait to landscape;

- Support Far and Near visual acuity test with distance from 25cm to 5cm;
- Support 14 visual acuity grades from 0.1 to 2.0; visual acuity
between 0.02 to 0.1 can also be tested under the apps direction;
- Randomized Optotypes, five types of Optotypes(E, C, Number, Sloan, and LEA)
- Decimal and fractional visual acuity display types.