Geographic Atrophy (GA) is an advanced form of Dry Age-Related Macular Degeneration (AMD). GA causes cells in your retina to atrophy, leading to vision loss. Typically, GA affects the fovea first, which is the central part of the macula, causing missing spots in your central vision. GA may not cause symptoms until intermediate or advanced stages. This is why comprehensive, yearly eye exams are so important.
What are the symptoms of GA?
While the early stages usually don't cause symptoms, as GA progresses, it can lead to vision changes. Each individual may experiences these changes differently. Some of these include:
A blank spot in the central vision
Straight lines appearing wavy
Colors appearing washed out
Difficulty seeing at night
How is GA diagnosed?
Your optometrist can diagnose GA during a comprehensive exam including dilation and an Optical Coherence Tomography (OCT) scan. Small changes in your retina can be seen on the scan even during the early stages and even if your are not experiencing symptoms.
Treatments for GA
Presciption eye injections can help slow the progression of GA.