Age-related macular degeneration (AMD) is a disease of the retinal centre of gradual onset. The symptoms of macular degeneration are blurred and distorted vision.
The so-called Amsler test can provide an indication whether you might possibly suffer from ADM. Please consult an ophthalmologist if you suspect AMD.
This is how the test is performed:
The Amsler-Test is also available as a PDF file.