CALIBRATION OF THE VISUAL ACUITY CHART



Another way to check the 
calibration of the projected 
acuity chart is to use the 
calibration chart supplied with 
many projectors.  It has the 
20/200 (6/60) letter printed the 
appropriate sizes for different 
viewing distances.  Hold the 
appropriate printed letter on 
the screen next to the projected 
letter to determine if the 
projected letter is the correct size.