The Two Types of AMD
All cases of macular degeneration begin as the dry form, but the disease can progress into the wet form over time.
Dry AMD: This is the most common classification, accounting for approximately 80% to 90% of all cases. It occurs when the light-sensitive cells in the macula gradually break down and thin out as you age. In its most advanced stage, known as geographic atrophy (GA), patients can experience severe central vision loss.
Wet AMD: This is a less common but more aggressive and advanced form of the disease. It develops when abnormal, fragile blood vessels grow underneath the macula. These new vessels can leak blood and fluid or cause scarring, which leads to rapid and severe central vision loss.