I can't tell you about treatment or prognosis, but you bring up an important point that can't be made enough.
Toy and Mini poodles, but not Standards, have a genetic form of Progressive Retinal Atrophy known as prcd-PRA. This condition causes juvenile blindness usually starting around age 4-5. The condition is only expressed in Poodles who have two copies of the gene and are thus affected. There is no cure and affected Poodles will go blind.
Since the early 2000s there has been a genetic test (Optigen) to identify the gene in Poodles. This test lets breeders know if a dog is Clear (A), Carrier (B) or Affected (C). By breeding only As or As to Bs, breeders can avoid producing Cs. Unfortunately for the OP, the test probably came a bit too late.
Poodles of all varieties are also subject to cataracts which can cause blindness. Because of this, all breeding Poodles of all varieties should have their eyes evaluated every year via a CERF exam.
Anyone looking to buy a Toy or Miniature Poodle should make sure that the dam and sire of a litter have been Optigen and CERF tested.