Correct Answer - Option 1 : 20 / 70 to 20 / 200
Visual Impairment: The term 'visual impairment' is used to refer to not only those who are blind but also those who have their own vision. When the person has residual vision above a certain level, he is said to have low vision or poor vision. However, if the residual vision is below that level, he is considered to be blind.
Legal Definition: A person is legally blind, if his / her field of vision is 20 degrees, while his / her visual acuity is below than 6 / 60 or 20/200 in the better eye with the best possible corrections with eyeglasses or contact lenses, then he is considered to be blind.
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Visual acuity refers to the ability to see clearly from a specified distance. It is measured both far and near distances. Visual acuity is usually tested by the use of the Snellen eye chart.
- The field of vision is the total area in which perception is possible when an individual is looking straight ahead. When gazing straight ahead, a normal eye can see objects within a range of approximately 180 degrees.
Hence, we can conclude that children considered a low vision have a visual acuity between 20 / 70 to 20 / 200.
