The first sign of retinitis pigmentosa is often night blindness followed by a slow loss of side vision.
Retinitis pigmentosa (RP) is a group of inherited diseases that damage the light-sensitive rods and cones located in the retina, the back part of our eyes.
Rods, which provide side (peripheral) and night vision are affected more than the cones that provide color and clear central vision.
Signs of RP usually appear during childhood or adolescence. The first sign is often night blindness followed by a slow loss of side vision. Over the years, the disease will cause further loss of side vision.