The macula is the part of the retina that distinguishes fine details at the center of the field of vision.
As we enlarge to a cross-section, macular degeneration is better seen as the partial breakdown of the insulating layer between the retina and the choroid layer of blood vessels behind the retina.
Review Date 8/4/2023
Updated by: Franklin W. Lusby, MD, Ophthalmologist, Lusby Vision Institute, La Jolla, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.