Tracking Eye vision

Has anyone tried tracking vision over time with an eye chart or any other tool to see the development of a disease or the effects of environmental factors or substances like coffee or caffeine in general. what was the process like and what did you learn.

Haven’t used either, but Ultimeyes and GlassesOff are two popular apps that people use to train their vision, and both apps track progress.

I’d be more interested in an app that measures pupil dilation and reaction times…