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What is Lenticular Sclerosis?

Lenticular sclerosis, also called nuclear sclerosis, is a very common aging change in the eyes of dogs and cats. It makes the center of the eye look cloudy, gray, or bluish. Many people worry that this means their pet has cataracts, but lenticular sclerosis is not the same thing as cataracts.

The lens is a clear part of the eye that helps focus light so your pet can see. As pets get older, the lens continues to form new fibers. Over time, these fibers become tightly packed in the lens's center. This makes the lens look cloudy, even though light can usually still pass through it. 

Is My Pet Going Blind?

Usually, no. Lenticular sclerosis does not usually cause major vision loss. Pets with this condition can still see, but they may not see fine details as well as they used to. Some pets may have a harder time judging distance, especially in dim light or on stairs. 

This is different from a cataract. A cataract is a true opacity (cloudiness) in the lens that blocks light. Cataracts can cause poor vision or blindness, depending on their size and density. 

What Does Lenticular Sclerosis Look Like?

Lenticular sclerosis often appears as a soft, gray, blue, or glassy haze deep within the eye. It usually affects both eyes and comes on slowly. It is most often noticed in older dogs and cats, often around eight to 10 years of age or older. 

Because cataracts, glaucoma, inflammation, corneal disease, and other eye problems can also make an eye look cloudy, it is best to have your veterinarian check the eyes.

How is Lenticular Sclerosis Diagnosed?

Your veterinarian will examine the eyes with a light and eye instruments. One clue is whether the veterinarian can still see through the lens to the back of the eye. With lenticular sclerosis, the lens may look hazy, but the retina can still be seen. With a cataract, the cloudy lens may block the view. 

Sometimes the difference is not obvious during a basic exam. If the eye is very cloudy, painful, red, or vision seems poor, your veterinarian may recommend an eye specialist.

Does Lenticular Sclerosis Need Treatment?

Treatment is not usually needed. Lenticular sclerosis is a normal aging change, not an infection, tumor, or emergency. Eye drops, supplements, and surgery do not reverse it.

The most important step is making sure the cloudiness is truly lenticular sclerosis and not a cataract or another eye disease.

What Can You Do at Home?

Keep your pet’s environment easy to navigate. Try not to move furniture around often. Use night lights if your pet seems unsure in dim areas. Block stairs if your pet is slipping or hesitant. Keep food, water, beds, and litter boxes in familiar places.

Call your veterinarian if you notice squinting, redness, eye discharge, sudden vision loss, bumping into objects, one eye looking much worse than the other, or the eye looking swollen or painful. These signs are not typical of simple lenticular sclerosis and should be checked.