what are the causes of loss of sight?
528065
['Macular degeneration. This is caused by changes in the macula. ... ', 'Glaucoma. This is usually caused by high pressure from the fluid inside the eye.', 'Cataracts. This is caused by a clouding of the lens inside the eye.', 'Diabetic retinopathy. This affects people who have diabetes.']
395903
A large tumor may cause loss of vision, particularly peripheral vision, if it compresses the optic chiasm (where the optic [eye] nerves come together, located above the pituitary gland). Headache may also occur; the type of headache varies from patient to patient. Headache may occur with a large or a small tumor.
657898
['vision impairment.', 'vestibular disorders, such as vertigo, dizziness.', 'respiratory disease, such as lung disease, oxygen use.', 'cardiovascular diseases, such as heart disease, heart attack.', 'chronic renal disease, such as kidney disease.']
419826
Cataracts are the most common cause of clouded vision. Most cataracts develop slowly, but usually become worse over time. Cataract surgery is the most effective treatment to help restore your vision. Other less common causes of cloudy vision include Fuchs' dystrophy, macular degeneration, and diabetic retinopathy.
919092
['Age-related macular degeneration.', "Alzheimer's disease2\ufeff", 'Diabetes.', 'Heart disease3\ufeff', 'High blood pressure4\ufeff', 'High cholesterol.']
1199863
['Heart problems.', 'Eye problems, including cataracts and glaucoma.', 'Intellectual disabilities.', 'Growth retardation.', 'Low birth weight.', 'Developmental delays.', 'Learning disabilities.', 'Deafness.']
331997
['Loss of vision or decreased vision in one or both eyes.', 'Changes in vision such as sudden spots, flashes of light, lightning streaks or jagged lines of light, wavy or watery vision, blurry faces, distortions or wavy lines, haloes around lights, double vision.']
160645
['Vision problems, including blurriness or blindness.', 'Muscle weakness.', 'Difficulty with coordination and balance.', 'Problems with walking and standing.', 'Feelings of numbness, prickling, or pain.', 'Partial or complete paralysis.', 'Difficulty speaking.']
861558
Things to remember Refractive errors including myopia (short-sightedness), hyperopia (long-sightedness), astigmatism and presbyopia (inability to focus on near objects) are the most common eye disorders. Vision problems due to refractive errors can generally be helped by glasses or contact lenses, or by laser surgery.
961175
['vision Impairment.', 'deaf or hard of hearing.', 'mental health conditions.', 'intellectual disability.', 'acquired brain injury.', 'autism spectrum disorder.', 'physical disability.']
1149002
Things to remember If you have any problems that seem to be recurring or getting worse, see an optometrist. Refractive errors including myopia (short-sightedness), hyperopia (long-sightedness), astigmatism and presbyopia (inability to focus on near objects) are the most common eye disorders.
1229126
Bad eyesight, or blurred vision, is most commonly caused by a refractive error like nearsightedness (myopia), farsightedness (hyperopia) or astigmatism. Refractive errors develop when the eye is unable to focus light directly on the retina.
846928
Blindness. Sickle cells can block tiny blood vessels that supply your eyes. Over time, this can damage your eye and lead to blindness.
571993
Rarely, red eye may be a result of an inflammatory condition such as iritis or uveitis, which can be caused by problems with the immune system. Iritis may be accompanied by sensitivity to light, blurred vision and headache. Acute glaucoma. This is an emergency that can result in loss of vision.
65853
The primary causes of blurred vision are refractive errors — nearsightedness, farsightedness and astigmatism — or presbyopia. But blurry vision also can be a symptom of more serious problems, including a potentially sight-threatening eye disease or neurological disorder.
1003655
Certain eye conditions like glaucoma and optic neuritis may cause a sudden or gradual loss of peripheral vision. This may develop as blurring in side-areas of your visual field, which can eventually lead to a symptom commonly described as tunnel vision if left untreated.
809191
Globally the number of people of all ages visually impaired is estimated to be 285 million, of whom 39 million are blind. People 50 years and older are 82% of all blind. The major causes of visual impairment are uncorrected refractive errors (43%) and cataract (33%); the first cause of blindness is cataract (51%).