While I couldnt get my iPhone and iPad to connect so that I could check distance vision, I was able to take other important tests. For me, by taking this test I found that I might have macular degeneration, at least in one eye which could lead to blindness. Im scared. It is a side effect of a medication I take. I made an appointment with my eye Dr to see just what is happening. This is a tool and when you sign in, they tell you its not a substitute for seeing an eye Dr, but for me and everyone else, it is a very good tool to let you know how your vision is in other ways. I do ask this company to please work on making the distance test work better and to please add the macular degeneration test available on the iPhone. Fortunately for me, I looked on my iPad also.