Have you noticed that your older dog’s eyes look cloudy? Perhaps you think he has developed cataracts. Well chances are that he does not have cataracts at all! Older dogs commonly have aging changes in the lenses of their eye.
This condition is called lenticular sclerosis, or nuclear sclerosis. We see it in our patients’ eyes every day. The most relevant point for you, as a dog owner is that a dog’s vision is rarely affected by lenticular sclerosis.
The ocular lens plays an important role in the vision changes of an aging dog’s eyes. When you look into your dog’s eyes you can see the pupil as a round black hole, surrounded by colored Iris. The lens is suspended within that pupillary circle. In a normal eye the lens is a clear oval shaped structure that should be invisible to an observer of the eye. The purpose of the lens is to refract (change direction of) light coming through the eye. This provides a more focused image on the retina at the back of the eye. Light scatters in a functional way as it moves through the lens. (more…)