I've got a 2,000 year old poodle/las opso mix who's got heavy cataracts in both eyes. Probably can only see light and dark. We play fetch with a racketball on tile so she can hear the bounces. Yes, it does take her a while to find the ball, but boy is she proud when she does find it.

Yes, she has adapted to life without sight quite well, and aside from bumping into things occasionally (she gave up running full tilt anymore), she doesn't seem to have any issues...

Little things help. For instance, she likes walking on wide sidewalks so she doesn't fall off too much. She's on a leash, so she can feel (and hear) where she is with respect to us.

We don't change the furniture around much, so once she gets the idea of where stuff is, she doesn't bump into it.

Because of her age (she's 15) the vet said she may not wake up from the anesthesia, so we're risking $5,000 ($2500 per eye) on something that COULD improve her vision, but COULD kill her.

Always a tough choice, but my opinion is that if her quality of life isn't affected that much, why risk it?