Veterinarian-written / veterinarian-approved articles for your dog.

Nuclear Sclerosis in Dogs

Nuclear sclerosis is a hardening of the lenses in a dog’s eyes.

Nuclear sclerosis, also called lenticular sclerosis, is a condition in dogs in which a bluish-gray haze develops on the lenses of the eyes. It's common in middle-aged to older dogs.

What Is Nuclear Sclerosis in Dogs?

Nuclear sclerosis is a normal age-related change in dogs' eyes. It is usually bilateral, which means that both eyes develop it.

It's not understood with certainty what causes nuclear sclerosis, but it seems to be the result of gradual hardening of the lens over time.

Is Nuclear Sclerosis the Same as Cataracts?

Nuclear sclerosis and senile cataracts in dogs are two different things. While nuclear sclerosis involves the hardening of lens fibers, cataracts involve their degeneration.

Nuclear sclerosis does not seem to negatively affect a dog's vision, while cataracts do.

If you see a milky haze in your dog's eyes, visit your veterinarian. The doctor will be able to tell the difference between the two conditions by examining the eye with an ophthalmoscope.

Treatment of Nuclear Sclerosis in Dogs

There is no treatment for nuclear sclerosis in dogs. However, while nuclear sclerosis doesn't cause cataracts, many dogs with lenticular (nuclear) sclerosis do go on to develop cataracts, which may sometimes be treated surgically. So, a dog that is diagnosed with lenticular sclerosis should be monitored regularly for the development of cataracts.

You May Also Like These Articles:

Collie Eye Anomaly

How to Care for a Blind Dog

Progressive Retinal Atrophy: PRA in Dogs

Cataracts in Dogs

Common Eye Conditions in Dogs

Disclaimer: This website is not intended to replace professional consultation, diagnosis, or treatment by a licensed veterinarian. If you require any veterinary related advice, contact your veterinarian promptly. Information at is exclusively of a general reference nature. Do not disregard veterinary advice or delay treatment as a result of accessing information at this site. Just Answer is an external service not affiliated with

Notice: Ask-a-Vet is an affiliated service for those who wish to speak with a veterinary professional about their pet's specific condition. Initially, a bot will ask questions to determine the general nature of your concern. Then, you will be transferred to a human. There is a charge for the service if you choose to connect to a veterinarian. Ask-a-Vet is not manned by the staff or owners of, and the advice given should not delay or replace a visit to your veterinarian.