Why Healthcare Providers Remove Cataracts

The first thing you may notice is a glare from oncoming headlights at night. Often a haze surrounds the lights.

Then, you're likely to find reading more challenging. It gets harder to see the letters, and they tend to blur together.

This is what happens when you have cataracts.

A cataract is a clouding of the eye's lens. The lens is a clear, soft structure behind the pupil that works much like a camera lens. The main cause of cataracts is aging. Other contributing factors include:

  • Genetics

  • Sunlight

  • Metabolic diseases, such as diabetes

  • Some medicines, including longtime use of corticosteroids such as cortisone or prednisone

  • Injury

  • A chronic inflammatory condition of the eye (uveitis)

When cataracts affect your ability to function, it's time to think about surgery.

Many people think surgeons take the cataract off the eye. Actually, the cloudy part of the lens is removed. Then a manmade lens (intraocular lens or IOL), is implanted. This new lens includes a prescription, much like eyeglasses. Still, you may need prescription glasses after surgery, especially for reading. 

In most cases, people are given a sedative before surgery but stay awake throughout the procedure. Some surgeons give numbing injections around the eye. Or anesthetic drops can be used.

Once the anesthetic is working, the surgeon makes a cut (incision) in the eye to help remove the cataract and implant the new lens. The surgeon often uses ultrasound energy to liquefy the cataract (phacoemulsification). The surgeon then removes the remains of the lens in a suction-like process called aspiration.

The painless procedure takes about 15 to 30 minutes. Complex cases are not common. But they need more time and care.

If both eyes have cataracts, surgery on the 2 eyes is done at different times. This is generally done a few weeks apart.

This is done to make sure that the first eye has healed without complications before doing surgery on the other eye. People go home the same day. They wear a patch or shield overnight to protect the eye. The eye is often checked the next day, a week after the surgery, and a month later.