Interesting. My eyesight is going downhill fast also. Of course I stare all day at a computer screen (with plenty of glare) also.
And I'm sure it has nothing to do with getting old.
Reminds me of how suit coats, shirts and pants all seem to shrink in the closet if I don't wear them for a few years. It's a great mystery. Must be a reaction caused by stagnant air and darkness. But, oddly enough, socks don't seem to be susceptible!