AMD usually starts with dry AMD that develops in one eye or both. The process is slow, it can take several years. In fact, many people are unaware that they have dry AMD because the disease usually has little or no early symptoms.

Progression of the disease

• The macula contains millions of light-sensitive cells called photoreceptors.
• Its cells are located on the retinal pigment epithelium, a thin membrane that supports them.
• Under the retinal pigment epithelium there's Bruch's membrane, which separates the retina from the blood supplied by the choroid.
• With age, drusens (transparent or yellowish deposits) accumulate between the retinal pigment epithelium and the membrane