Enter the gap size (arc min) into the Visual Acuity Calculator. The calculator will evaluate the Visual Acuity.

## Visual Acuity Formula

The following two example problems outline the steps and information needed to calculate the Visual Acuity.

VA = 1 / GS

Variables:

- VA is the Visual Acuity ( )
- GS is the gap size (arc min)

To calculate the visual acuity, divide 1 by the gap size.

## How to Calculate Visual Acuity?

The following steps outline how to calculate the Visual Acuity.

- First, determine the gap size (arc min).
- Next, gather the formula from above = VA = 1 / GS.
- Finally, calculate the Visual Acuity.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem : **

Use the following variables as an example problem to test your knowledge.

gap size (arc min) = 3

VA = 1 / GS** **= ?