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.

A nonspecific term denoting degeneration of the retinal pigment epithelium and/or retinal photoreceptor cells.

Diminished clarity of vision.

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.

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.

Loss of the outer nuclear layer (photoreceptor layer) as assessed by ocular coherence tomography.

An abnormality of the retina characterized by pigment deposition. It is typically associated with migration and proliferation of macrophages or retinal pigment epithelial cells into the retina; melanin from these cells causes the pigmentary changes. Pigmentary retinopathy is a common final pathway of many retinal conditions and is often associated with visual loss.