[Killakwinn]

We're looking into this circle bug -- very sorry about that!

I won't argue that the current test isn't crude. We're rolling out increasingly sophisticated versions with each update, but I agree that in its current state our exam has a ton of room for improvement.

I do have to mention that the 1) vision check (e.g. do you see 20/20 with you current/expired prescription) and 2) the eye health tests are two different portions of our exam and serve two different purposes.

These latter set of "low-tech" maneuvers (double vision, amsler grid, red desaturation) are very high-level screening mechanisms for more serious underlying issues and do not have much to do with the numbers on a person's prescription. To be more specific, the overlapping circles are meant to assess if someone is having double vision, which in a worst case scenario could be a symptom of acute cranial nerve palsy.