Ring or Donut Scotoma

A ring or donut shaped scotoma is an area of reduced vision that forms a shape similar to a ring or donut - the person can see fine in the center and off-center a little bit but then there is an area of reduced vision followed by another area or normal vision. Sometimes the ring or donut will not be totally round or complete but may appear like two crescent moons facing each other. A ring scotoma is often an early sign of a serious retinal disease/degeneration such as retinitis pigmentosa or other type of rod-cone degeneration.