Age-Related Macular Degeneration: Causes, Symptoms & Stages

If you are over fifty, you have likely thought about your eye health. You might find you need more light to read or that small print looks a bit blurrier. For most people, these changes are just part of getting older. But sometimes, they can be early signs of age-related macular degeneration, or AMD. Since AMD is the main cause of vision loss in older adults, recognizing the signs early can help protect your eyesight.

What Is AMD?

Your macula is like the high-definition center of your retina. It is what lets you see faces, read print, and focus on details. AMD goes after that exact area. With a damaged macula, it becomes harder to see fine details. This can make reading, recognizing faces, and driving more difficult. The good news is that AMD only affects your central vision. Your side vision remains normal, so you will not lose your sight completely.

What Causes AMD?

The cause of AMD is still unknown, but doctors know the main risk factors. Age is the biggest one; being fifty or older increases your risk. Smoking is another major factor. High blood pressure and eating a lot of saturated fat also raise your chances. Genetics matter too, so if your family has a history of AMD, you are more likely to get it.

The Two Types of AMD

There are two types of AMD, and they act differently.

Dry AMD

About eighty percent of people with AMD have the dry type. In this form, the light-sensitive cells in the macula slowly break down. Under your retina, small yellow deposits called drusen begin to accumulate. Vision loss usually happens gradually. You might not notice any changes at first, so regular eye exams are important.

Wet AMD

In wet AMD, abnormal blood vessels grow where they do not belong, under the retina. They leak fluid and blood, which quickly damages the macula. The result? Sudden vision loss, wavy lines, and dark spots right in the center of your view.

Symptoms to Watch for

Early AMD usually does not cause symptoms. This is why regular eye exams are so important. As AMD gets worse, you might notice:

Blurry central vision
Trouble recognizing faces
Straight lines that look wavy or bent
A dark or empty spot in the center of your vision
Needing more light for reading

If you notice any of these symptoms, especially if straight lines look wavy or you have sudden changes in your vision, see an eye doctor right away.

The Stages of AMD

Early AMD

Drusen are present, but vision loss is minimal. You might not notice anything, but an eye doctor can spot the deposits during an exam.

Intermediate AMD

Drusen become larger and more common. Some people start to notice vision changes, such as needing more light or having some blurriness.

Late AMD

This stage includes advanced dry AMD and wet AMD. Vision loss is clear and affects your daily life. In wet AMD, abnormal blood vessels cause fast damage. In advanced dry AMD, many light-sensitive cells have broken down.

How Is AMD Diagnosed?

Eye drops dilate your pupils so the doctor can see your retina clearly. They look for drusen and other changes. You might also use an Amsler grid at home to check for wavy lines or blank spots. If wet AMD is suspected, a special dye test can show leaking blood vessels.

Can AMD Be Treated?

While there is no cure for AMD, the good news is that treatments can keep it from getting worse as fast.

For dry AMD, your doctor might suggest AREDS2 vitamins, which are special supplements for people with intermediate or late dry AMD. Lifestyle changes are important too. Eating leafy greens, fish, and nuts, quitting smoking, and getting regular exercise can all help.

For wet AMD, the main treatment is anti-VEGF injections. These stop abnormal blood vessels from growing and leaking. The injections go directly into your eye, but numbing drops help keep you comfortable. Most people need these injections regularly over time.

To learn more about AMD, visit The Eye Zone. Our office is in Dallas, Texas. Call (214) 368-8825 to schedule an appointment.

https://www.hopkinsmedicine.org/health/conditions-and-diseases/agerelated-macular-degeneration-amd

https://health.ucdavis.edu/blog/cultivating-health/macular-degeneration-stages-symptoms-and-when-to-get-an-eye-exam/2024/06