Calibration_control

Calibration Assistant Enter the distance from patient to wall chart. Click outside the entry box and the letter height will update. The 'E' used in calibration will be the size of the 20/100 acuity line on the wall chart. Adjust with the buttons above and measure the top 'E' on the wall chart.
Chart Distance	Calibration Letter Height
inches	in. decimal	in. fractions	mm
	Calculate	???	???

Selected the letters numbers and symbols to use in the eye chart. Selected items will appear with a solid blue box around them. Click the item to toggle as selected or not selected.

Adjust the background contrast by pressing the white and black arrows. The large arrows for big steps in contrast and the small arrows for small adjustments.

Make relative adjustments to the contrast between green and red brightness. Green arrows will darken the green. Red arrows will darken the red. Large arrows for large steps.

Click arrows to adjust red/green balance

Enter the distance from patient to wall chart. Click outside the entry box and the letter height will update. The 'E' used in calibration will be the size of the 20/100 acuity line on the wall chart. Adjust with the buttons above and measure the top 'E' on the wall chart.