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This is a Eyes condition.

Congenital Stationary Night Blindness

What is Congenital Stationary Night Blindness?

This condition is named for the poor vision affected dogs experience in dim light (nyctalopia), though in severe cases it can progress to full blindness. Affected dogs also have abnormalities of the retina and retinal pigmented epithelium, the heavily pigmented tissue that nourishes and protects the retina.

What are the signs & symptoms that develop in affected dogs?

Puppies with night blindness often appear normal during the day, but will run into walls and other objects at night. As the disease progresses, day vision can also be impacted and lead to complete blindness.

When do signs and symptoms develop?

Night vision loss is first reported in puppies (6 weeks of age), but does not become detectable on ophthalmic exam until 2-3 years.

How do vets diagnose this condition?

Veterinarians perform a complete ocular exam and notice brown patches over the retina (back of the eye).

How is this condition treated?

Currently, there is no treatment for night blindness.