Find Information About:

Drugs & Supplements

Get information and reviews on prescription drugs, over-the-counter medications, vitamins, and supplements. Search by name or medical condition.

Pill Identifier
WebMD

Pill Identifier

Having trouble identifying your pills?

Enter the shape, color, or imprint of your prescription or OTC drug. Our pill identification tool will display pictures that you can compare to your pill.

Get Started
My Medicine
WebMD

My Medicine

Save your medicine, check interactions, sign up for FDA alerts, create family profiles and more.

Get Started

WebMD Health Experts and Community

Talk to health experts and other people like you in WebMD's Communities. It's a safe forum where you can create or participate in support groups and discussions about health topics that interest you.

  • Second Opinion
    WebMD

    Second Opinion

    Read expert perspectives on popular health topics.

  • Community
    WebMD

    Community

    Connect with people like you, and get expert guidance on living a healthy life.

Got a health question? Get answers provided by leading organizations, doctors, and experts.

Get Answers

Sign up to receive WebMD's award-winning content delivered to your inbox.

Sign Up

Eye Health Center

Font Size
A
A
A

Age-Related Macular Degeneration - What Happens

Dry AMD

With dry age-related macular degeneration (dry AMD), the cells and blood vessels beneath the macula begin to thin and break down as they age.

When these cells and blood vessels stop working, the nerve cells in the macula that detect light can't work as well as they used to. As more and more of the nerve cells in the macula break down, vision loss very slowly gets worse.

Recommended Related to Macular Degeneration

Age-Related Macular Degeneration Overview

Macular degeneration is the leading cause of severe vision loss in people over age 60. It occurs when the small central portion of the retina, known as the macula, deteriorates. The retina is the light-sensing nerve tissue at the back of the eye. Because the disease develops as a person ages, it is often referred to as age-related macular degeneration (AMD). Although macular degeneration is almost never a totally blinding condition, it can be a source of significant visual disability. There...

Read the Age-Related Macular Degeneration Overview article > >

You may have the disease for several years before it affects how you are able to read, drive, and do everyday activities. If you have AMD in only one eye, you may not notice minor vision changes, because your unaffected eye automatically makes up for vision problems in your other eye.

A small percentage of people who have dry AMD eventually develop wet AMD.

Wet AMD

Wet AMD begins with the growth of abnormal blood vessels under the macula. These blood vessels break easily. They leak blood and fluid and cause scar tissue, all of which push against the macula. They change the macula's shape and cause it to send distorted images to your brain. Straight lines begin to appear wavy or curved, and objects may seem oddly shaped or smaller.

Scar tissue also cuts off the macula from the normal support cells that it needs in order to work. Nerve cells in the macula begin to die, causing a loss of central vision.

If not treated, the scar beneath the macula may continue to grow, affecting more and more of the nerve cells in the macula. Vision loss gets worse as more of the macula becomes involved. The entire macula may be destroyed by this process, resulting in a complete loss of central vision.

Treatment can sometimes delay or prevent further vision loss, but it cannot reverse vision loss that has already occurred.

With wet AMD, vision loss can happen fast-within months or even weeks. This can make it hard to adjust to the vision loss.

Even though AMD may affect central vision, it doesn't cause complete blindness. And most people keep good side vision.

WebMD Medical Reference from Healthwise

Last Updated: September 09, 2014
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.
1
Next Article:

Today on WebMD

Woman holding tissue to reddened eye
Learn about causes, symptoms, and treatments.
eye
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
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