Macular Degeneration: Protecting Your Central Vision

Age-related macular degeneration (AMD) is a leading cause of vision loss among adults over 60. Unlike cataracts, which can be surgically corrected, AMD affects the retina itself, making early detection especially important.

What Is the Macula?
The macula is the small central portion of the retina responsible for sharp, detailed vision. It allows us to read, recognize faces, and see fine detail.

When the macula deteriorates, central vision becomes distorted or blurred while peripheral vision often remains intact.

Two Types of Macular Degeneration
AMD occurs in two main forms.

Dry AMD
This is the most common type, accounting for about 85–90% of cases. It develops gradually as the macula thins and small deposits called drusen accumulate under the retina.

Vision loss in dry AMD is usually slow but progressive.

Wet AMD
Wet AMD is less common but more serious. It occurs when abnormal blood vessels grow beneath the retina, leaking fluid or blood.

Without treatment, wet AMD can cause rapid and severe central vision loss.

Risk Factors
Several factors increase the risk of AMD:

• Age over 60

• Family history of macular degeneration

• Smoking

• High blood pressure

• Excessive sun exposure

Smoking is one of the most significant modifiable risk factors. Smokers are up to four times more likely to develop AMD.

Early Warning Signs
Patients should seek evaluation if they notice:

• Straight lines appearing wavy

• Dark or blank spots in the center of vision

• Difficulty recognizing faces

• Increasing need for bright light while reading

The Amsler grid is a simple home test that can help detect early distortion.

Treatment Options
Treatment depends on the type of AMD.

For dry AMD, management focuses on slowing progression with lifestyle changes and specific vitamin supplements based on the AREDS2 study.

For wet AMD, treatment involves intravitreal anti-VEGF injections, which can stabilize or even improve vision when started early.

Protecting Vision
Patients can reduce their risk of progression by:

• Quitting smoking

• Maintaining healthy blood pressure and cholesterol

• Eating a diet rich in leafy greens and omega-3 fatty acids

• Wearing UV-protective sunglasses

The Takeaway
While macular degeneration cannot always be prevented, early detection and treatment can preserve vision for many years. Regular eye examinations are essential for anyone over 60.