eye disorders
Nutritional and Toxic Optic Neuropathies
Symptoms
In people with nutritional or toxic optic neuropathies, vision usually deteriorates gradually over days to weeks. A blind spot may develop and gradually enlarge, usually involving the center of vision. It may not be noticed at first. Color vision may be affected more severely than the loss of visual acuity (sharpness of vision). Both eyes are usually affected. Ethylene glycol and particularly methanol poisoning can cause sudden, complete loss of vision. Both substances can cause other serious symptoms such as coma, difficulty breathing, vomiting, and abdominal pain. Drinking antifreeze (ethylene glycol) or methanol (wood alcohol or methyl alcohol) can cause sudden and complete vision loss. 