Skip to content
My WebMD Sign In, Sign Up

Eye Health Center

Font Size

Nearsightedness (Myopia) - Topic Overview

What is nearsightedness?

opth_01.jpgNearsightedness (myopia) is a common cause of blurred vision. It can be mild, moderate, or severe. If you are nearsighted, objects in the distance appear blurry and out of focus. You might squint or frown when trying to see distant objects clearly. View a photo as seen through a normal and a nearsighted eye camera.gif.

Nearsightedness is usually a variation from normal, not a disease. Less often, nearsightedness happens because of another disease or condition.

What causes nearsightedness?

Most nearsightedness is caused by a natural change in the shape of the eyeball. Less often, nearsightedness may be caused by a change in the cornea or the lens.

These problems cause light rays entering the eye to focus in front of the retina camera.gif. Normally, light focuses directly on the retina. See a picture of the parts of the eye camera.gif.

There is nothing you can do to prevent nearsightedness.

What are the symptoms?

The main symptom is blurred vision when looking at distant objects. You may have trouble clearly seeing images or words on a blackboard, movie screen, or television. This can lead to poor school, athletic, or work performance.

Your child may be nearsighted if he or she squints or frowns, gets headaches often, or holds books or other objects very close to his or her face. Children who are nearsighted may sit at the front of the classroom or very close to the TV or movie screen. They may not be interested in sports or other activities that require good distance vision.

If you think that your child may be nearsighted, see an eye care specialist. Treating nearsightedness early may prevent children from having trouble in school and in social settings.

When does nearsightedness start? How does it change over time?

Nearsightedness usually begins in childhood between ages 6 and 12. During the teen years, as the eyeballs continue to grow, it may develop or get worse quickly. Teenagers may need new glasses every 12 months or even more often.

Nearsightedness usually stops getting worse by age 14 to 16 in women and by the mid-20s in men. Most nearsightedness stabilizes at a mild to moderate level.

How is nearsightedness diagnosed?

A routine eye exam can show whether you are nearsighted. The eye exam includes questions about your eyesight and a physical exam of your eyes. Ophthalmoscopy, tonometry, a slit lamp exam, and other vision tests are also part of a routine eye exam.

Eye exams should be done for new babies and at all well-child visits.1 Nearsightedness is usually first discovered in children of grade-school age.

How is it treated?

Most people who are nearsighted use eyeglasses or contact lenses to correct their vision.

Surgery can also reduce or fix nearsightedness. There are several surgery options, such as LASIK, PRK (photorefractive keratectomy), and artificial lens implants. The goal of surgery is to help you see more clearly without glasses or contacts. Most doctors consider 20/40 vision or better after surgery a satisfactory result. People with 20/40 vision or better are allowed to drive a car without corrective lenses.

If glasses or contact lenses are inconvenient for your work or lifestyle, surgery may be a good choice. But nearsightedness is not a disease, and a nearsighted eye is otherwise normal and healthy. Weigh your desire to have clear vision without glasses or contacts against the risks and cost of surgery. And be aware that you may still need to wear glasses or contact lenses after surgery.

If you are nearsighted, get regular eye exams, and see your eye care specialist if you have changes in your vision.

1

WebMD Medical Reference from Healthwise

Last Updated: June 24, 2011
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.
Next Article:

Today on WebMD

businesswoman wearing fun eyeglasses
Slideshow
Pink Eye Slideshow
Slideshow
 
Woman with itchy watery eyes
Slideshow
grilled salmon and spinach
Video
 

Understanding Stye
Article
human eye
Article
 
eye
Video
eye exam timing
Video
 

vision test
Tool
is vision correction surgery for you
Article
 
high tech contacts
Article
eye drop
Article
 

Special Sections