Excessive sensitivity to light with the sensation of discomfort or pain in the eyes due to exposure to bright light.

Inability to see well at night or in poor light.

An absolute or relative decrease in retinal sensitivity extending from edge (periphery) of the visual field in a concentric pattern. The visual field is the area that is perceived simultaneously by a fixating eye.

A pale yellow discoloration of the optic disc (the area of the optic nerve head in the retina). The optic disc normally has a pinkish hue with a central yellowish depression.

A type of cataract affecting the posterior pole of lens immediately adjacent to ('beneath') the Lens capsule.

Pigment migration into the retina in a bone-spicule configuration (resembling the nucleated cells within the lacuna of bone).

Lack of any response to stimulation upon electroretinography.

Atrophy of the choroid and retinal layers of the fundus.

An inherited retinal disease subtype in which the rod photoreceptors appear to be more severely affected than the cone photoreceptors. Typical presentation is with nyctalopia (due to rod dysfunction) followed by loss of mid-peripheral field of vision, which gradually extends and leaves many patients with a small central island of vision due to the preservation of macular cones.