What is Cataract?
Cataract is the clouding of the normally clear lens of the eye. The lens focuses light rays on the retina at the back of the eye to produce a sharp image of what we
see. When the lens becomes cloudy, the light rays cannot pass properly through it, and the image becomes
Cataracts are a normal part of the aging process. The older you are, the more likely you are to have
them. About half of Americans ages 65-74 have cataracts. Most people with cataracts have a cataract in
both eyes. However, one eye may be worse than the other because each can develop at a different rate.
Cataracts can also come from eye injuries, certain diseases, or medications. There can be a family tendency
towards cataracts at an earlier age.
What Are The Symptoms of Cataract?
Here are some symptoms of a cataract:
These symptoms also can be signs of other eye problems. Only a thorough eye exam can tell you if
your symptoms are from a cataract.
How is Cataract Diagonsed?
A complete eye exam is all that is needed to determine whether or not you have a cataract. This will
include vision testing and dilating your pupils. The doctor will use a bright light to see whether your
lenses are clear and to check for other eye problems. The doctor may also perform brightness acuity
testing (BAT), a way of measuring how much glare affects your vision. Occasionally other tests may be
used, such as potential vision testing pachymetry or specular microscopy.
- Cloudy, fuzzy, foggy, or filmy vision.
- Changes in the way you see colors.
- Problems driving at night because headlights seem too bright.
- Problems with glare from lights or the sun.
- Frequent changes in your eyeglass prescription.
- Double vision.
- Better near vision for a while (only in farsighted people).
|How Can a Cataract be treated?
There are no medications, eye drops, exercises or glasses that will cause cataracts to disappear once
they have formed. Surgery is the only way to remove a cataract. The cataract may need no treatment at all
if the vision is only a little blurry. A change in your eyeglass prescription may improve vision for a while.
Stronger bifocals or the use of a magnifying lens may be enough for reading. When you are not able to see
well enough to do the things you like to do - reading, driving, watching TV, sewing, etc. - even with the
proper prescription, cataract surgery should be considered. There is no such thing as “waiting until it
In cataract surgery the cloudy lens is removed from the eye. In most cases, the focusing power of the
natural lens is restored by replacing it with a permanent intraocular lens implant.
How Do I Decide Whether To Have Surgery?
Most people have plenty of time to decide about cataract surgery. Your doctor cannot make your decision for you, but talking with your doctor can help you decide.
Tell your doctor how your cataract affects your vision and your life. Circle the statements below that
apply to you and share this list with your doctor:
You may also have other specific problems that you want to discuss with your eye doctor.
Most people who have a cataract recover from surgery with no problems and improved vision. In fact,
serious complications are not common with modern cataract surgery. This type of surgery has a success
rate of 98 percent in patients with otherwise healthy eyes. But no surgery is risk-free. There is about a 1%
chance of decreased vision. Although serious complications are not common, when they occur, they could
result in loss of vision.
- I need to drive, but there is too much glare from the sun or headlights.
- I do not see well enough to do my best at work.
- I do not see well enough to do the things I need to do at home.
- I do not see well enough to do things I like to do (for example, read, watch TV, sew, hike, play
cards, go out with friends).
- I am afraid I will bump into something or fall.
- Because of my cataract, I am not as independent as I would like to be.
- My glasses do not help me see well enough.
- My eyesight bothers me a lot.