On Sat, 17 Apr 2010, Jim Adcock wrote:
The way people use their eyes, the ways people read, the capabilities of their eyes, and their brains to process information, vary widely, and in ways you cannot imagine unless you personally have run into problems and have noticed that you have them. In the simplest almost universal case people start experiencing eyestrain around age 40 requiring the use of compensating visual orthotics. Age 40 also seems to be about the age of greatest denial ;-)
I could read the OED Microprint edition without decent lighting until 42. After that it was all downhill so fast I never really tried it any more-- with or without glasses, but would use the provided Bausch & Lomb reader. Today I use $1 glasses with all my computers. . .I just buy ever grade of magnification and leave each with the computer it works best with. I'll know I'm in trouble if/when I move to the 3x range. . .hee hee!