well, the ophthalmologist says that I have very slight clouding in the lenses, little more than normal aging, and that if I can see OK while wearing a hat, which I can, then he definitely won't operate. Instead he'll review the situation every 2 years. When a surgeon say an op isn't necessary, I'm happy with that advice. Thanks everyone for all the great advice, which will come in handy if/when I ever have this op.