The nerve tissue that lines the back of the eye. The retina converts light energy into nerve signals that are transmitted to the visual part of the brain via the optic nerve. A hereditary condition that causes a slowly progressive loss of rods and cones. Vision is initially lost in the periphery and then gradually involves the more central regions. Ultimately all vision is lost.
Difficulty seeing at night is often an early symptom of the disease.
Vitreous body Fluid that fills the posterior chamber of the eye, between the iris and the retina.