Reference Terms
from Wikipedia, the free encyclopedia
Visual acuity
Visual acuity (VA) is acuteness or clearness of vision, especially form vision, which is dependent on the sharpness of the retinal focus within the eye, the sensitivity of the nervous elements, and the interpretative faculty of the brain.
Note: The above text is excerpted from the Wikipedia article "Visual acuity", which has been released under the GNU Free Documentation License.
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