Feline Lenticular Sclerosis
As cats age, changes occur within their bodies, including the eye and one common eye change is called lenticular sclerosis. Medical records commonly abbreviate this normal change as L.S.
The lens of the eye is responsible for directing and focusing light onto the retina in the back of the eye. This light is then detected and results in vision. The lens is encased in a membranous capsule. The lens is a continuously changing structure, with new layers being laid down on top of one another through out the life of the animal. Because the eye is fixed in size and the lens capsule does not stretch a great deal, the lens cannot get larger as these new layers develop. Instead, the inner layers of the retina become compressed, which allows room for the new layers to be laid down. The oldest layers of the lens are in the center of the lens and this area is called the nucleus. The newest layers of the lens surround the nucleus and this outer area is called the cortex.
As the animal ages the nucleus of the lens becomes denser, harder and somewhat cloudy in appearance. The nucleus may have a blue-gray tint to it, while the cortex remains completely clear and transparent. This aging change of the lens is known as lenticular or nuclear sclerosis. Typically, lenticular sclerosis begins around 8 to 9 years of age in the cat and slowly becomes more obvious as the cat gets older.
In the geriatric cat, lenticular sclerosis can be so cloudy that the condition is easily mistaken for a cataract of the lens. Cataracts can also result in a gray-white appearance to the eye due to cloudiness within the lens. Fortunately, vision is not significantly affected in lenticular sclerosis until the last stages of the cat’s life.
What to Watch For
Diagnosis of Lenticular Sclerosis in Cats
Treatment of Lenticular Sclerosis in Cats
Home Care and Prevention
As the animal ages it is important to try and keep their environment consistent and predictable. Leave furniture in the same place, make sure that toys are not left in their path, keep stairs and decks cordoned off, and closely supervise the animal when they are outside.
As animals age they may also develop a significant decrease in their senses of hearing and smell. This can make it difficult for them to adjust to new environments, and they can become lost and confused.
There is no prevention for this condition. Every animal develops lenticular sclerosis to some degree as they get older.