The OFA Has Screened Over 600,000 Dogs’ Eyes — and the Breed Patterns Are Striking
The Orthopedic Foundation for Animals (OFA) maintains the largest registry of ophthalmologic evaluations in companion dogs. Formerly known as the Canine Eye Registry Foundation (CERF), this database has accumulated over 600,000 eye examinations performed by board-certified veterinary ophthalmologists. The registry was designed primarily for breeding stock evaluation, but the data it contains is invaluable for any dog owner who wants to understand their breed’s specific eye disease risk.
What the data reveals is substantial breed-to-breed variation. Some breeds — Australian Shepherds, Cavalier King Charles Spaniels, Cocker Spaniels — have eye disease rates above 15-20%. Others have rates below 3%. The conditions involved range from cosmetically insignificant (distichiasis — extra eyelashes) to vision-threatening (progressive retinal atrophy, glaucoma, cataracts).
Understanding your breed’s specific risk profile determines when eye screening should begin, how often it should occur, and what to watch for between visits.
How OFA Eye Certification Works
An OFA eye examination is a standardized ophthalmologic evaluation performed by a board-certified veterinary ophthalmologist (Diplomate, American College of Veterinary Ophthalmologists — DACVO). The exam includes:
- Slit-lamp biomicroscopy: Examines the anterior segment (cornea, iris, lens, anterior chamber)
- Indirect ophthalmoscopy: Examines the posterior segment (retina, optic nerve, vitreous)
- Tonometry (when indicated): Measures intraocular pressure to screen for glaucoma
- Schirmer tear test (when indicated): Quantifies tear production to detect dry eye (keratoconjunctivitis sicca)
Certification is valid for 12 months, reflecting the progressive nature of many hereditary eye conditions. A dog that passes at age 2 may develop a heritable condition by age 4.
High-Risk Breeds and Their Primary Concerns
Progressive Retinal Atrophy (PRA)
PRA is a group of inherited retinal degenerations that cause progressive vision loss, typically ending in blindness. It is the canine equivalent of retinitis pigmentosa in humans.
Highest-risk breeds:
- Labrador Retriever (prcd-PRA — autosomal recessive, genetic test available)
- Cocker Spaniel (prcd-PRA)
- Miniature and Toy Poodles
- Golden Retriever (GR-PRA1 and GR-PRA2)
- Australian Cattle Dog
- Dachshund (cord1-PRA)
- Irish Setter
Screening protocol for PRA-prone breeds:
- Genetic testing before breeding (DNA tests available for most PRA forms)
- Annual ophthalmoscopic examination starting at age 1
- Miyadera et al. (2012) identified over 20 distinct genetic mutations causing PRA across different breeds, each with different age of onset and progression rate
Cataracts
Heritable cataracts are among the most common eye diseases in dogs. The OFA registry shows cataract as the most frequently identified eye abnormality across breeds.
Highest-risk breeds:
- Australian Shepherd (posterior polar cataracts, often bilateral)
- Boston Terrier
- French Bulldog
- Siberian Husky (posterior subcapsular, often young-onset)
- Miniature Schnauzer
- Golden Retriever
- Cocker Spaniel
- Labrador Retriever
- Standard Poodle
Screening protocol:
- Annual slit-lamp examination starting at age 1 for high-risk breeds
- Diabetic dogs should have ophthalmologic examination at diagnosis and every 6 months thereafter (diabetic cataracts can develop within weeks of diagnosis)
- Cataract surgery success rates exceed 90% when performed before lens-induced uveitis develops
Primary Glaucoma
Glaucoma — elevated intraocular pressure causing optic nerve damage and blindness — has a strong hereditary component in several breeds. Miller and Bentley (2015) emphasized that primary glaucoma in dogs is typically bilateral, with the second eye developing disease within 8-36 months of the first.
Highest-risk breeds:
- Cocker Spaniel (narrow/closed angle)
- Basset Hound (open angle)
- Beagle (open angle)
- Shar-Pei
- Chow Chow
- Siberian Husky
- Shih Tzu
- Great Dane
Screening protocol:
- Baseline tonometry (intraocular pressure measurement) by age 3 for high-risk breeds
- Annual tonometry thereafter
- Gonioscopy (evaluation of the iridocorneal angle) is recommended for breeds with narrow-angle glaucoma predisposition
- When glaucoma is diagnosed in one eye, prophylactic treatment of the second eye should be discussed immediately
Keratoconjunctivitis Sicca (Dry Eye)
Highest-risk breeds:
- Cavalier King Charles Spaniel (curly coat dry eye variant)
- English Bulldog
- West Highland White Terrier
- Cocker Spaniel
- Shih Tzu
- Pug
- Lhasa Apso
Screening: Schirmer tear test at annual examination, with owner awareness of discharge, squinting, and corneal cloudiness as early signs.
Breed-Specific Screening Schedules
Based on OFA registry data and published breed-specific prevalence studies, recommended screening frequencies:
Annual Ophthalmologic Examination From Age 1
Breeds with high rates of multiple heritable eye conditions:
- Australian Shepherd, Cocker Spaniel, Cavalier King Charles Spaniel, Golden Retriever, Siberian Husky, Miniature and Toy Poodles, Labrador Retriever, Boston Terrier
Annual Examination Starting at Age 3
Breeds with moderate eye disease prevalence or later-onset conditions:
- German Shepherd, Rottweiler, Standard Poodle, Bernese Mountain Dog, Basset Hound, Beagle, Great Dane
Examination Every 2 Years From Age 5
Breeds with lower eye disease prevalence:
- Most working, herding, and sporting breeds not listed above
- All dogs by age 7-8 as part of senior screening regardless of breed
All Dogs Over Age 8
Annual ophthalmologic evaluation should be part of every senior dog screening protocol, regardless of breed, because age-related cataracts, nuclear sclerosis, retinal degeneration, and secondary glaucoma increase with age across all breeds.
Genetic Testing: Screening Before Symptoms
For many heritable eye conditions, DNA tests now exist that can identify affected, carrier, and clear dogs before clinical signs develop:
- Embark, Wisdom Panel, and breed-specific panels include PRA, primary lens luxation, and other eye disease markers
- OptiGen specializes in canine eye disease genetic testing
- Genetic testing is most valuable for breeding decisions but also helps pet owners anticipate and prepare for breed-specific risks
- Petersen-Jones (2005) emphasized that genetic testing should complement, not replace, clinical ophthalmologic examination, since not all heritable eye diseases have identified genetic markers
Frequently Asked Questions
How much does an OFA eye exam cost?
A CERF/OFA ophthalmologic examination typically costs $30-$75 when performed at breed club eye clinics, or $150-$300 at private veterinary ophthalmology practices. Annual screening is cost-effective compared to emergency treatment for advanced eye disease.
Can eye diseases in dogs be prevented?
Most heritable eye diseases cannot be prevented in an affected individual, but early detection through screening enables earlier intervention (cataract surgery, glaucoma treatment, dry eye management) that preserves vision longer. Genetic testing of breeding stock prevents transmission to future generations.
My dog’s eyes look normal — do they still need screening?
Many eye diseases — including early cataracts, PRA, and open-angle glaucoma — produce no visible signs in early stages. By the time an owner notices vision changes, significant damage may have already occurred. Screening detects disease before clinical signs appear.
What is the difference between nuclear sclerosis and cataracts?
Nuclear sclerosis is normal age-related lens hardening that gives older dogs’ eyes a bluish-gray haze. It does not significantly affect vision. Cataracts are lens opacities that do impair vision. They can look similar from the outside, which is why veterinary ophthalmologic examination (not just visual inspection) is needed to distinguish them.
Bottom Line
Eye disease prevalence varies dramatically by breed, and many vision-threatening conditions progress silently for months or years before owners notice symptoms. OFA registry data identifies which breeds face the highest risk and which conditions to screen for. Annual ophthalmologic examination by a board-certified specialist is recommended from age 1 for high-risk breeds and from age 7-8 for all dogs. Early detection enables earlier intervention — and intervention is almost always more effective when disease is caught before significant vision loss has occurred.