OK, so I could go look this up, but I'm very pregnant and tired and lazy so nyeh.
So what are the common cause(s) of blindness in poodles? It is a known breed issue, right? Although the few books I've looked through haven't mentioned that particular issue as one of the half-dozen they always mention.
Anyway, just idle curiosity on my part - I have a mini poodle who's been (mostly, now entirely) blind since birth, but never knew why. If I'd known what I know now way back then I would have contacted the breeder (he's papered, but since they sold him to a lady for her 12 year old niece - me - I'm betting they weren't what one would call breeders par excellance) to let them know once we figured it out, but it's far too late now (if for no other reason than I have NO idea who the breeders were, since the papers are long lost).
Either cataracts or PRA would be the common ones, but if the dog has been blind from birth it could have been an infection. That does happen in puppies sometimes (they get an infection under the still-closed eyelids), and if you don't treat it perfectly and promptly the dog can go blind for life.