The basic concept remains the same regardless of platform: You take a read-the-eye-chart test at home, and an eye doctor reviews your results to determine if your current prescription is still OK.

MedTech Visibly, now seeing eye-to-eye with the FDA, brings online vision test back to market By Andrea Park Aug 17, 2022 12:19pm FDA ophthalmology smartphone Mobile Apps ...

We all know about the visits to the ophthalmologist for a vision checkup. The eye chart has letters that go from large to so very small. You stand 20 feet back covering one eye at a time and read.

Then the very short vision test appears. It’s one line of a letter chart, just like you’d see in an optometrist's office. Cover one eye and read the letters aloud. Cover the other and repeat.

When addressing visual acuity, the goal of treatment is to help people achieve 20/20 vision. Some people may have a better vision than 20/20, while others may have less than 20/20 vision.