If you are suffering from a problem with your vision you suspect may be caused by cataracts, the first step to regaining clear vision is a diagnosis by an experienced ophthalmologist. A cataract exam may require a combination of tests to gauge not only if you have cataracts, but the severity of the cataracts. Cataracts are commonly diagnosed using pupil dilation, a tonometry test, and a visual acuity test. Further tests may be required beyond these to determine what type of cataract you have.
Pupil Dilation
One test used to diagnose cataracts is pupil dilation. You may have had your pupils dilated before, and pupil dilation to diagnose cataracts is not that much different. Pupil dilation is done so that diseases of the lens and retina can be checked for, and is a common way to test for cataracts. The first thing your ophthalmologist will do is use eyedrops to widen your pupils. This is done so that they can see the rear part of your eye. Complete dilation of the pupil takes about 15 minutes. A bright light and special lens will be used by the ophthalmologist as you stare straight ahead. After the test, you must wear sunglasses and should probably have someone drive you home because dilated pupils will cause light sensitivity and blurred vision.
Tonometry Test
Another cataract diagnosis test is the tonometry test. A tonometry test measures fluid pressure in the eye. Your ophthalmologist will be able to determine if you have a cataract through this measurement. Sometimes a tonometry test is done by directing a puff of air at the eye. Other times, numbing eyedrops are used and a tiny amount of pressure is placed on the eye. A tonometry test can also determine the presence of glaucoma.
Visual Acuity Test
This is probably the most recognized test, as it is the test where you are asked to read differently sized letters or symbols on a chart. One eye is tested at a time and then together to see your acuity from various distances. This test is used to diagnose a wide variety of visual issues, including cataracts.
If you are in Monmouth or Ocean County, New Jersey, and are interested in finding out more about how to diagnose cataracts, or being tested yourself, please contact Susskind & Almallah Eye Associates, P.A. to set up an appointment.