The formula to calculate the Visual Acuity (VA) is:
\[ VA = \frac{1}{GS} \]
Where:
Visual acuity refers to the clarity or sharpness of vision, which is measured by the ability to discern letters or numbers at a given distance according to a fixed standard. It is a crucial metric in ophthalmology and optometry to assess the visual performance of an individual.
Consider an example where the gap size (GS) is 0.5 arc min:
Using the formula to calculate the Visual Acuity:
\[ VA = \frac{1}{0.5} = 2 \]
This means that the visual acuity for this example is 2.
