Weird request... but does anyone else take some form of stimulant or drug that dilates your pupils and work at a computer during the day? I've taken adderall and ritalin for ADHD and my eyes will actually be sore at the end of the day. It goes away by morning, but there's been times I just felt like shit at the end of the day and go home and sleep because I just can't stand any more light.
For OP's question... I don't think my eyes have degraded one bit, but I'm still in my 20s and I had 20/10 vision to start with.