I have 20 / 25 vision.... but how is that possible?

[Big Cuddly Bear]

20/25 means that you can see at 20 feet what most people can see at 25 feet (not the other way around). This has nothing to do with the ability to read things like a book or computer. As someone else mentioned, as you get older, the lens in your eye loses its elasticity - this is presbyopia. You may see distance fine, but your lens can't adjust to reading things close up.

OK, now I understand the 20 / 25. I also went to a site that is all about eyes, and it said that by age 50, 100% of people have started to develop some type of "old eye" issues, even if they are miniscule and the person doesn't even know it yet.