
I don't understand why you think this was horrible??? the breeder could have had the operation done at their own cost and then sold the pup at normal price, if the operation left the4 pup fit and healthy with no more problem.
Having had an eye ulcer myself (very painful) caused by getting a blackbery cane in the eye while picking the fruit, it has left me with no problems, but they are painful and can be tricky to heal.
I have had a bitch with an eye ulcer and the operation if you can all it hat was to sew the third eyelid across the ey so allowing the ulcer to heal without being iritated by the dog rubbing at it. Ointment is able to permeate through to help with the healing. she wasn't a Puppy but in her second year of life, but could easily happen to a pup getting caught with a siblings claw, or the family cat taking a swipe.
some breeds due to their eye shape are more prone to eye Ulcers, but this isn't the case with my breed, it was just one of theose things. She has had several Eye Tests under the BVA schemnes, and only the one a few months after the Ulcer was treated showed a faint scar, but the next test this had heled completely.