Skip to content

Eye Health Center

Font Size

Eye Health and Low Vision

Low vision is the loss of sight that is not correctable with prescription eyeglasses, contact lenses, or surgery. Low vision does not include complete blindness, because there is still some sight. Low vision can be treated or offset, however, with the use of vision aids such as magnifying glasses.

Low vision includes different degrees of sight loss -- from having blind spots to almost a complete loss of sight. The American Optometric Association divides low vision into two categories based on the vision in the best eye:

Recommended Related to Eye Health

Supplements for Vision and Healthy Eyes

You may have heard about recent research suggesting that certain nutrients can help delay or prevent eye problems and disease. You may also have heard a lot of claims for over-the-counter (OTC) visionsupplements containing these nutrients -- and claims for others that have not been tested in clinical studies. So what should you believe? What can you do to protect your eye health and eyesight using vision supplements? Here is information to help you decide. Important: Your doctor is your first...

Read the Supplements for Vision and Healthy Eyes article > >

1. Partially sighted, meaning the person's vision is between 20/70 and 20/200 with conventional prescription lenses

2. Legally blind, meaning the person's vision is no better than 20/200 with conventional correction or a restricted field of vision less than 20 degrees wide

Low vision is a result of a variety of conditions and injuries, but age is a factor. Macular degeneration, glaucoma, and cataracts are more common in people over age 45 and even more so in adults over age 65. It is estimated that some 14 million Americans suffer from vision impairment.

The most common types of low vision include:

  • Loss of central vision. A condition in which there is a blind spot in the center of one's vision
  • Loss of peripheral (side) vision. An inability to see anything to either side and above or below eye level; central vision, however, remains intact.
  • Night blindness. An inability to see in poorly lit areas such as a theater, as well as outside at night
  • Blurred vision. A condition in which objects both near and far appear out of focus
  • Hazy vision. A condition in which the entire field of vision appears to be covered with a film or glare

What Causes Low Vision?

Besides age-related retinal conditions, there are many other possible causes of low vision, including conditions such as glaucoma and diabetes. Low vision may also result from cancer of the eye, albinism, stroke, eye trauma or a brain injury. If you have or are at risk of having these disorders, you are at an increased risk for low vision.

Today on WebMD

Woman holding tissue to reddened eye
Learn about causes, symptoms, and treatments.
Simple annoyance or the sign of a problem?
red eyes
Symptoms, triggers, and treatments.
blue eye with contact lens
Tips for wearing and caring.
Understanding Stye
human eye
eye exam timing
vision test
is vision correction surgery for you
high tech contacts
eye drop