Impairment Of Vision Due To Old Age

Impairment Of Vision Due To Old Age


In developed countries most people have an impairment of vision due to old age :) and need glasses by the time they are between 40 and 45 years of age. Visual impairments have a considerable economic cost both directly due to the cost treating people with vision loss and indirectly due to their decreased ability to work.  Rates of visual impairment have decreased since the 1990s.

The World Health Organization (WHO) estimates that 80% of visual impairment is either preventable or curable with treatment. This includes cataracts, the infections river blindness and trachoma, glaucoma, diabetic retinopathy, uncorrected refractive errors, and some cases of childhood blindness. Many people with significant visual impairment benefit from vision rehabilitation, changes in their environment, and assistive devices.

Impairment Of Vision Due To Old Age


Visual impairment, a.k.a.vision impairment or vision loss, is actually a decreased ability to see to a extent that it causes problems which cannot be fixed by usual means, such as glasses. The term can also be used for people with vision loss who do not have access to glasses or contact lenses. Visual impairment is often defined as a visual acuity of worse than either 20/40 or 20/60 after correction with glasses. The term blindness is used for complete or nearly complete vision loss. Visual impairment may cause people difficulties with normal daily activities such as driving, reading, socializing, and walking.

Impairment Of Vision Due To Old Age


The most common causes of visual impairment globally are uncorrected refractive errors, cataracts (33%), and glaucoma (2%). Refractive errors include near sighted, far sighted, presbyopia, and astigmatism. Cataracts are the most common cause of blindness. Other disorders that may cause visual problems include age related macular degeneration, diabetic retinopathy, corneal clouding, childhood blindness, and a number of infections. Visual impairment can also be caused by problems in the brain due to stroke, premature birth, or trauma among others. These cases are known as cortical visual impairment. Screening for vision problems in children may improve future vision and educational achievement. Screening adults without symptoms is of uncertain benefit. Diagnosis is by an eye exam.

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In conclusion, There were 940 million people with some degree of vision loss as of 2015 . 246 million had low vision and 39 million were blind. The majority of people with poor vision are in the developing world and are over the age of 50 years. Rates of visual impairment have decreased since the 1990s. Visual impairments have considerable economic costs both directly due to the cost of treatment and indirectly due to decreased ability to work]