PD meter

For distance we always use 8

Reading 40

Computer screen distance 70

The best methode is to leave the lever on 8 (infinity).

For Reading minus 4mm an d computer minus 2 mm

Place the pupilmeter on the nose and look in the oculair and find the Right eye.

Move the line to the middle of the pupil and do the same with the Left eye.

Read the pd in the display.

Measure the pd with just a Ruler.