Young eyes vs. older eyes....makes a world of difference! I can hardly put on my makeup, and am only 53. I do not mind gray hair or wrinkles but do miss the eyesight of my youth. Even with glasses or contacts, the seeing is not what it had been.
I would hate to have to work all day in a lab with a microscope at this age.
My husband and I were discussing this just the other day. He had an MRI on his knee. Do they have people who do nothing but read MRI's all day? Do they take mandatory breaks? I think after a few hours I'd be cross-eyed and miss bunches of stuff.