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Causes
- Presbyopia, difficulty focusing on objects that are close. Noticeable in early to mid 40s.
- Cataracts, cloudiness over eye's lens, causing poor nighttime vision, halos around lights, and sensitivity to glare. Daytime vision is eventually affected. Common in the elderly.
- Glaucoma, increased pressure in the eye, causing poor night vision, blind spots, and loss of vision to either side.
- Diabetic retinopathy, leads to bleeding into the retina.
- Macular degeneration, loss of central vision, blurred vision, distorted vision and colors appearing faded.
- Eye infection, inflammation, or injury.
- Floaters, tiny particles drifting across the eye.
- Retinal detachment, includes floaters, flashes of light across visual field, or a sensation of a shade or curtain hanging on one side of visual field.
- Optic neuritis, inflammation of the optic nerve from infection or multiple sclerosis.
- Stroke or TIA.
- Brain tumor.
- Bleeding into the eye.
- Temporal arteritis, inflammation of an artery in the brain that supplies blood to the optic nerve.
- Migraine headaches, spots of light, halos, or zigzag patterns are common symptoms prior to the start of the headache.
Symptoms
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