A cataract is simply a "clouding" of the natural lens in your eye. It is a natural process with aging. As light passes through the cloudy lens, it is diffused or scattered. This results in blurred or defocused vision. A cataract generally should be removed to provide better, clearer vision.
An artificial lens, called an IOL, will be implanted in the eye to replace the eye's clouded crystalline lens during cataract surgery.
For patients, it's a simple operation. A tiny incision is made in the eye. Through this incision, the surgeon inserts an instrument, about the size of a pen tip. The surgeon may select to use either an AQUALASE® device, which uses gentle pulses of liquid to wash away your cloudy lens, or and ultrasonic instrument that breaks up and gently removes your cloudy lens. Once the clouded lens has been removed, the next step is to replace it. That is, to implant an artificial lens that will do the work of your own lens. This artificial lens is referred to as an intraocular lens or IOL.
After the surgery, you'll be given a short time to rest. Then, the very same day, you can go home. Within the next 24 hours, your doctor will probably want to see you for evaluation. Drops will be prescribed to guard against infection and help your eyes heal. For a few days, you may need to wear a clear shield, especially at night, to prevent you from rubbing your eye.
All currently available artificial lenses filter UV light, but the ACRYSOF® Natural IOL filters both UV and blue light. The ACRYSOF® Natural lens is transparent yellow -- the color necessary to filter blue light. The patented yellow tint does not alter the natural colors of the things you see or the quality of your vision.
Today, the ACRYSOF® family of lenses, including the ACRYSOF® Natural IOL, are among the most frequently implanted lenses in the world. This is largely due to the long term clinical results of the lens. Furthermore, these lenses are made of a patented material developed specifically for the eye.
A pterygium is a fleshy growth that invades the cornea (the clear front window of the eye). It is an abnormal process in which the conjunctiva (a membrane that covers the white of the eye) grows into the cornea.
Although pterygium soundd like a mysterious diseases, it is actually quite a common, usually benign eye condition. This lesion appears as a whitish-yellowish bump or fleshy "growth" on the exposed conjunctiva that appears to "grow" onto the cornea, forming a winglike structure. It is called a pterygium from the Greek word for wing (pterygion). Most pterygia are slow growing and rarely cause significant problems.
Although the causes of these lesions are not completely understood, prolonged exposure to ultraviolet and infrared radiation from sunlight has been implicated. Other environmental irritants, such as dust and wind, may play a role as well. People who spend considerable time in the sun are much more likely to have pterygia than indoor folks. Susceptible groups include individuals who work outdoors such as farmers and fishermen or those who engage in outdoor activities such as golfing and gardening.
There is no known method of preventing a pterygium. However, a prudent precaution is to protect the eye from undue sun exposure by wearing protective eyewear with good ultraviolet blockage, or at least a rimmed hat. Fortunately, most cases of pterygium do not constitute worrisome eye disease, and surgery usually is not necessary.
While patients can be symptomatically treated with artificial tears, no reliable medical treatment exists to reduce or even prevent pterygium progression. Definitive treatment is achieved only by surgical removal. Long term follow up is required as pterygium may recur even after complete surgical correction.