Cataracts (both Hereditary and Congenital Hereditary forms) and Generalised Progressive Retinal Atrophy (PRA), can occur in the Miniature Schnauzer.
Every effort must be made to eradicate such problems from the breed and it is very strongly recommended that ALL Miniature Schnauzers be eye tested annually, by a vet registered under the British Veterinary Association/The Kennel Club Eye Scheme.
Puppies can be tested for the Congenital format 6-8 weeks. You should only buy a puppy that has been tested. Hereditary cataract and PRA need annual tests as they both develop later. The former can only be diagnosed from about 6 months so all puppies should be tested again at 12 months, and annually after that. PRA may not appear until 3 years of age upwards.
All dogs should be tested annually up to the age of 8 years.
Should your dog be diagnosed with any of the above conditions it is VITAL that you immediately inform the Miniature Schnauzer Club, Schnauzer Club of Great Britain, Northern Schnauzer Club and its breeder, this is the only way to stamp out these conditions.
BVA/Kennel Club Eye Panellist List [pdf]