dimness of vision with no apparent pathological condition

It also may reduce your vision in bright light and cause glare or halos around lights at night. A posterior subcapsular cataract often affects your reading vision. A posterior subcapsular cataract starts as a small spot that usually forms near the back of the lens, right in the path of light. Cataracts that affect the back of the lens, called posterior subcapsular cataracts.As the cataract slowly grows, the streaks spread to the center and affect light passing through the lens. A cortical cataract begins as white, wedge-shaped spots or streaks on the outer edge of the lens cortex. Cataracts that affect the edges of the lens, called cortical cataracts.It may become difficult to tell colors apart. But with time, the lens slowly turns more yellow or brown and makes your vision worse. A nuclear cataract may even improve your reading vision for a short time. A nuclear cataract may at first cause objects far away to be blurry but objects up close to look clear. Cataracts affecting the center of the lens, called nuclear cataracts.

This causes a difference in vision between eyes. The cataract in one eye may be worse than the other. As a result, your vision becomes blurred.Ĭataracts usually happen in both eyes, but not always at the same rate. This prevents a sharply defined image from reaching your retina. A cataract scatters and blocks the light as it passes through the lens. This is what causes the clouding in the lenses.Īs the cataract grows, the clouding becomes worse. Aging and some medical conditions can cause proteins and fibers within the lenses to break down and clump together. This produces clear, sharp images on the back part of the eye, called the retina.Īs you age, the lenses in your eyes become less flexible, less clear and thicker. The lens focuses light that passes into your eye. The lens sits behind the colored part of your eye, called the iris. How a cataract formsĪ cataract is a cloudy lens. Long-term use of steroid medicines also may cause cataracts to develop. Cataracts also can be caused by other eye conditions, past eye surgery or medical conditions such as diabetes. Some disorders passed down from parents that cause other health problems can increase your risk of cataracts. This causes vision to become hazy or cloudy. Proteins and fibers in the lens begin to break down. Most cataracts develop when aging or injury changes the tissue that makes up the eye's lens.

Dimness of vision with no apparent pathological condition