Age-related macular degeneration is the leading cause of irreversible blindness among Americans age 65 and older. For reasons scientists have yet to pinpoint, parts of the retina and the macula become diseased. As AMD progresses, tiny, fragile blood vessels begin to develop in the retina. These vessels often leak blood and fluid that damages the retina even further. Blurred vision may be the first symptom.
Straight lines begin to appear crooked.
Dark or empty spaces may block central vision.