A cataract is a clouding of the eye lens that, although not inherently painful, can lead to bigger issues.

An early cataract is often just an incidental finding on your pet’s veterinary exam — like a pinpoint lesion that’s not causing a problem. However, cataracts grow to involve more of the lens, causing a progressive loss of vision. Cataracts can cause other problems too, like increased pressure or inflammation in the eye, which can be painful.

The most common causes of canine cataracts are hereditary disease and diabetes. In cats, chronic intraocular inflammation is most often to blame.

Other problems can cause the eye to appear cloudy, and any of them warrant a veterinary visit. Treatment is available, but it’s most effective sooner versus later.