<unk>  <unk>  is an inherited, degenerative eye disease that causes severe vision impairment  due to the progressive degeneration of the rod photoreceptor cells in the retina. This form of retinal dystrophy manifests initial symptoms independent of age; thus,<unk>  diagnosis occurs anywhere from early infancy to late adulthood. Patients in the early stages of<unk>  first notice compromised peripheral and dim light vision due to the decline of the rod photoreceptors. The progressive rod degeneration is later followed by abnormalities in the adjacent retinal pigment epithelium <unk> E) and the deterioration of cone photoreceptor cells. As peripheral vision becomes increasingly compromised, patients experience progressive "tunnel vision" and eventual blindness.  Affected individuals may additionally experience defective light-dark adaptations, nyctalopia (night blindness), and the accumulation of bone spicules in the fundus.
Retinitis pigmentosa
Corneal dystrophy
Central serous retinopathy
Diabetic retinopathy
Vitelliform macular dystrophy
Purtscher's retinopathy
Dry eye syndrome
Band keratopathy