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The main symptom is loss of vision, with colors appearing subtly washed out in the affected eye. In many cases, only one eye is affected and the person may not be aware of the loss of color vision until the examiner asks them to cover the healthy eye. People may also engage in "eccentric viewing" using peripheral vision,to compensate for central vision loss characteristic in genetic, toxic, or ...
It is light-sensitive and communicates visual messages to the brain. If the retina detaches, it moves and shifts from its normal position. This can cause photopsia, but can also cause permanent vision loss. Medical attention is needed to prevent vision loss. Procedures may include laser treatment, freezing, or surgery.
Diabetic retinopathy. Often asymptomatic, but can cause spots in the eye and vision loss. Diabetic retinopathy (also known as diabetic eye disease), is a medical condition in which damage occurs to the retina due to diabetes. It is a leading cause of blindness in developed countries. Diabetic retinopathy affects up to 80 percent of those who ...
Again, prognosis is variable and dependent upon the affected individual, treatment compliance, and degree of vision loss at diagnosis. In both toxic and nutritional neuropathy, vision generally recovers to normal over several days to weeks, though it may take months for full restoration and there is always the risk of permanent vision loss.
Photic retinopathy. Photic retinopathy is damage to the eye 's retina, particularly the macula, from prolonged exposure to solar radiation or other bright light, e.g., lasers or arc welders. The term includes solar, laser, and welder's retinopathy and is synonymous with retinal phototoxicity. [1] It usually occurs due to staring at the Sun ...
Myopia, also known as near-sightedness and short-sightedness, [ 5 ] is an eye disease [ 6 ][ 7 ][ 8 ] where light from distant objects focuses in front of, instead of on, the retina. [ 1 ][ 2 ][ 7 ] As a result, distant objects appear blurry while close objects appear normal. [ 1 ] Other symptoms may include headaches and eye strain. [ 1 ][ 9 ] Severe myopia is associated with an increased ...
Glaucoma is a group of eye diseases that lead to damage of the optic nerve, which transmits visual information from the eye to the brain. Glaucoma may cause vision loss if left untreated. It has been called the "silent thief of sight" because the loss of vision usually occurs slowly over a long period of time. [5] A major risk factor for glaucoma is increased pressure within the eye, known as ...
Retinal detachment. Retinal detachment is a disorder of the eye in which the retina peels away from its underlying layer of support tissue. [1] Initial detachment may be localized, but without rapid treatment the entire retina may detach, leading to vision loss and blindness. It is a surgical emergency.