Blind dogs can manage very well, but obviously it is better to have the cataracts removed if finance permits.
Dogs blind from birth fare better than
dogs that become blind later
in life. You already have an understanding about not moving furniture, etc., and there are lots f things you can do to improve the quality of life for a blind dog, but ultimately they are still compromised ... and some gs deal with it better than others.
You didn't cause this to happen.