currawong, I began to have the same problem last year. I saw my optometrist about it. I now have a pair of glasses that I use only for reading at piano. It works. They are not a strong enough prescription to see across the room, but they are great for that intermediate range of seeing sheet music at piano.
Thanks, Ann - I've actually had piano glasses for about 12 years (they work for the computer, too), so I have the ordinary reading at the piano under control. The problem comes when the print is unusually small, as with a miniature score. I can read
it, if I take my glasses off and get ridiculously close, but that doesn't work for playing. Some sort of magnifying device, if it worked for a paper score and not just a computer screen, would be useful for me, I think, in certain circumstances.