I have a blur in one eye only shortly after I do any close work, even after only 5 minutes. It is right in the center of my vision, so I went to a retina specialist, suspecting AMD, but doc said it was fine. When it started, my eye doc said my astigmatism was worse, but he gave me a new rx, and it didn't help. It doesn't bother me when I read, funnily enough, but seems to be if I concentrate on a real small area. Any ideas?