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A cataract is a common condition that causes a clouding of the eye's natural lens, and affects millions of people each year, including more than half of all Americans over the age of 65. Cloudiness develops as a result of a buildup of protein in the lens
Cataracts cause a progressive, painless loss of vision. The lens clouds naturally as we age causing a gradual reduction of vision. The exact cause of cataracts is unknown, although it may be a result of injury, certain medications, illnesses (such as diabetes), prolonged exposure to ultraviolet light and smoking.
Your doctor may perform a series of tests in order to diagnose a cataract. A comprehensive eye examination including refraction, glare testing, and a dilated eye exam will be performed to test the vision and to examine the condition of the lens and other parts of the eye. Your doctor may also perform tonometry, a procedure that measures the pressure in the eye.
Patients with cataracts often do not experience any symptoms when the condition first develops. Cataracts will continue to progress with no apparent pain, although patients may experience:
Cataract removal is one of the most common operations performed in the U.S. today. It is also one of the safest and most effective.
In most cataract surgeries, the removed lens is replaced by an intraocular lens (IOL). An IOL is a clear, artificial lens that requires no care and becomes a permanent part of your eye. With an IOL, you'll have improved vision because light will be able to pass through it to the retina. Also, you won't feel or see the new lens.
Artificial lenses (IOLs) are implanted in the eye to replace natural lenses for patients with cataracts, presbyopia or severe refractive errors. Until recently, IOLs were only available to correct distance vision. These monofocal lenses helped improve distance vision after cataract surgery, but patients still needed glasses or contact lenses for near vision activities like reading and playing cards. Now, advancements in technology have produced multifocal and accommodative IOLs that allow patients to see clearly at all distances -- near, far and many distances in between. Multifocal IOLs such as ReSTOR® Multifocal and accommodative IOLs such as the Crystalens® preserve distance vision and correct presbyopia so cataract surgery patients -- and patients seeking treatment for presbyopia alone -- can enjoy clear sight without relying on glasses.
The procedure to replace a patient's natural lens with a multifocal or accomodative IOL is the same as that used in cataract surgery.
The AcrySof® ReSTOR® Multifocal IOL is a revolutionary multifocal lens that improves vision in a range of distances, allowing patients to see from near to far, without glasses. Once your cataract is removed and the AcrySof® ReSTOR® Multifocal IOL is inserted, you will see all distances clearly, usually without glasses. The results can be life changing-imagine no longer being dependent on your glasses! Four out of five AcrySof® ReSTOR® lens recipients reported never wearing glasses after having the lens placed in both eyes.
Crystalens® is a new replacement lens (IOL) that works naturally with muscles in the eye to retain the eye's ability to "accommodate" – to shift focus between nearby and distant objects. With older IOLs, patients lose this ability and require corrective eyewear to see clearly at near and intermediate distances.
Unlike rigid lenses, the flexible silicone Crystalens features innovative hinges that allow it to move with the eye's muscles and accommodate seamlessly, thereby reducing or eliminating the need for vision correction. The Crystalens is implanted using the same, nearly risk-free cataract surgery techniques as with other IOLs.
Multifocal IOLs are ideal for cataract patients who have one or more of the following symptoms:
Your doctor will determine whether or not this lens is right for you after a comprehensive eye exam and evaluation of your medical history and goals for surgery.