I have often seen that breeders will do an ACVO check on puppies eyes before they go to their new homes. What are you looking for?

You have them checked for Retinal Folds and Hereditary Cataracts.

What do retinal folds indicate?

Look on the CERF website:
http://www.vmdb.org/dxspot.html

Responsible breeders cannnot afford not to check a puppy's eyes for retinal folds surely? I wouldn't buy any pup unless it had been eye checked clear.