degree of visual impairment is set on the eye's ability to see two glowing dots with a minimum distance between them.Normal visual acuity equal to one - 1.0, corresponds to the human ability to distinguish on a special table of the tenth line of numbers and letters from a distance of 5 meters.In medicine, there are several classifications of visual impairment in humans.
as the main medicine used in the classification of visual impairment, depending on a person's ability to see.
Depending on the time of occurrence of the defect following classification of violations highlighted in ophthalmology view:
The basis of this classification, impairment is the presence of partial or no understanding of the world around them.
There is a classification of disorders of the visual function, depending on the causes of the defect:
This specification impairment is based on the change in a person's ability to see, but not at its full absence.
Each of these classifications, the ability to see violations using an ophthalmologist for an accurate diagnosis and is an important criterion to assess the person's general health.Therefore the degree of visual impairment is determined depending on the severity and causes of visual sensitivity of oppression.
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