Dry macular degeneration is caused when drusen begin to accumulate in and around the macula.

CNN: New techniques slow progress of age-related vision loss

However, studies have shown that supplements and a healthy diet can slow the progression of dry macular degeneration.

CNN: New techniques slow progress of age-related vision loss

As of now, there is no FDA-approved treatment for dry macular degeneration, although a few drugs and devices are in clinical trials.

CNN: New techniques slow progress of age-related vision loss

According to the National Eye Institute, about 85 to 90 percent of patients with advanced macular degeneration have the dry form.

CNN: New techniques slow progress of age-related vision loss

There are two forms of age-related macular degeneration, or AMD: the dry form, known as non-neovascular, and the wet form, called neovascular.

CNN: New techniques slow progress of age-related vision loss