Stargardt disease is also known as Stargardt macular dystrophy, juvenile macular dystrophy and fundus flavimaculatus.
Stargardt disease is an inherited eye condition that affects your macula which is the tiny central part of your retina, the light-sensitive layer at the back of your eye. It causes a reduction in your central detailed vision, which is the vision you use when looking directly at something. It doesn't usually affect your peripheral or side vision.
Image taken from allaboutvision.com