OFA (CERF) Examinations

What is a Genetic Disease?:

Genetic diseases are those that are passed on from parent to offspring through genes that carry the codes for each specific trait. Many of the diseases and disorders that affect the eyes are associated with specific genetic factors and multiple eye diseases which affect dogs are known to exhibit evidence of a genetic or heritable cause.

Top Ten Genetic Diseases by The American College of Veterinary Ophthalmologists (ACVO):


  1. Keratoconjunctivitis sicca (KCS)
  2. Cataract
  3. Lens luxation or subluxation
  4. Glaucoma
  5. Persistent hyperplastic primary vitreous (PHPV)
  6. Retinal detachment
  7. Retinal dysplasia – geographic or detached forms
  8. Optic nerve coloboma
  9. Optic nerve hypoplasia
  10. Progressive Retinal Atrophy (PRA)

Genetic Eye Examinations:

OFA Eye Certification exams (previously “CERF” exams) are screening examinations performed by board certified veterinary ophthalmologists in order to identify changes within the eye(s) suggesting the presence of one or more of these diseases. The exam is performed following pupillary dilation and consists of indirect ophthalmoscopy & slit lamp biomicroscopy. After the examination the ophthalmologist will complete the OFA Companion Animal Eye Registry (CAER) form and indicate any specific disease(s) found. The forms are in triplicate – one copy is for the vet’s records, one is for the owner, and one is for the OFA’s Clinical Database. Certification is valid for 12 months from the date of the eye exam. Annual re-examination is recommended.To schedule an OFA examination for one or more pets, please call reception at VOC.