When you DO get to the cataract stage, and I am quite serious, the doctor will give you new "internal" lenses corrected to your eyesight. It's very cool, I had it done and only need glasses for close up stuff, not for photography in the field.
Pepper wrote:
Talk to your eye doctor about the possiblility of contact lens. I have found that using them I can see everything I need to see but still have to use reading glasses. The point is that they may be able to give you enough help to get you back to where you were say 10 years ago. Just talk to your doctor about the possibilities. I was amazed at the options that were out there.