Common causes of vision loss, which may occur in one or both eyes, include age-related macular degeneration, diabetes-related retinal damage, glaucoma, cataract and eye trauma, according to Healthgrades. Stroke, optic neuritis, retinal detachment and certain medications are also possible causes.
Inflammation, infection, trauma or other causes can damage certain parts of the eye, leading to vision changes, explains Healthgrades. Vision loss may also occur when a health condition affects the fluid pressure in the eye or when inadequate blood supply, an autoimmune disease or inflammation causes damage to the optic nerve, which arranges and sends visual impulses from the retina to the brain. Some conditions affect particular areas of the brain responsible for interpreting vision.
Vision loss refers to poor night vision, double vision, hazy vision or blurred vision, states Healthgrades. Blind spots and loss of peripheral vision are also forms of vision loss. Some people experience sudden vision loss, while others develop the condition gradually.
Accompanying symptoms that likely indicate a serious condition include partial or total blindness, double vision, eye pain, eye redness, or unusual pupil size, notes Healthgrades. Vision loss that occurs with dizziness, slurred speech, change of consciousness, sudden weakness or intense headache calls for emergency medical help. Prompt diagnosis by a healthcare professional is crucial to avoid permanent vision loss.