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Cataracts

Simulation photograph: normal vision Simulation photograph: cataract

What is a cataract?

A cataract is a clouding or opaque area over the lens of the eye - an area that is normally transparent. As this thickening occurs, it prevents light rays from passing through the lens and focusing on the retina - the light sensitive tissue lining located in the back of the eye. With some cataracts, this clouding is caused when some of the protein which makes up the lens begins to clump together and interferes with vision. Cataracts are rare in children. They can affect either one eye (unilateral) or both eyes (bilateral).

Some cataracts are small and do not cause any visual symptoms. However, other, more progressive, cataracts can cause visual problems in children. Cataracts in children are uncommon.

What causes cataracts?

A child may be born with the disease (congenital), or it may develop later in life (acquired). Possible causes of cataracts include the following:

Did You Know?

The word "cataract" literally means "waterfall." For persons with an advanced cataract that covers a large portion of the eye lens, vision can be described as trying to see through a waterfall.

The majority of congenital cataracts (those present at birth) are present in children who also have other eye problems or other health problems. In approximately 25 percent of children born with congenital cataracts, the condition is due to a genetic cause such as a metabolic disorder (caused by an inherited enzyme deficiency) or a chromosome abnormality (i.e., Down syndrome).

What are the symptoms of cataracts?

The following are the most common symptoms of cataracts. However, each child may experience symptoms differently. Symptoms may include:

The symptoms of cataracts may resemble other eye conditions. Always consult your child's physician for a diagnosis.

What are the different types of cataracts?

According to the National Eye Institute, part of the National Institutes of Health, cataract types are subdivided accordingly:

Picture of a standard eye chart

How are cataracts diagnosed?

In addition to a complete medical history and eye examination of your child, diagnostic procedures for cataracts may include:

In addition, other tests may also be performed to help learn more about the health and structure of your child's eyes.

Treatment for cataracts:

Specific treatment for cataracts will be determined by your child's physician based on:

Treatment is tailored to the child and the type of cataract he/she has. In some cases, vision loss caused by a cataract may be aided by eyeglasses or contact lenses. However, surgical removal of cataracts is often recommended in infants and children.

Protect your child's eyes from the sun:

Although parents go through great lengths to protect their children's skin from the harmful rays of the sun, many forget that the eyes need to be protected, too. Nearly half of American parents do not regularly provide their children with sunglasses that protect their eyes from the sun's ultraviolet (UV) rays. Exposure to sun may set children up for potential vision problems later in life.

The sun can cause sunburned corneas, cancer of the eyelid, cataracts, and macular degeneration, among other problems. In addition, children are more susceptible because their lenses do not block as much UV as adult lenses. Children also tend to spend more time outdoors than their parents, often in places where there is a lot of sun reflection - beaches, pools, and amusement parks. Most UV eye damage is cumulative.

Protecting a child's eyes from the sun is simple:

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