The rare congenital condition of retinitis pigmentosa give rise to diffuse peripheral pigmentation with intervening pallor producing night, and later total, blindness.

• 少见的先天性色素性视网膜病变引起周边部位呈弥漫性色素沉着并杂以灰白色沉着于其间，而产生夜盲，到晚期导致全盲，即失明。