Pupillary Distance Measure

Pupillary Distance Measure Preparation

Measurement preparation

You should be able to clearly see the reflection of your face in the phone screen.  To do this, you must have a light source in front of you. A window is best. It gives even lighting. In addition, during the measurement, your head and the phone should be as still as possible. The window also helps, as you can press the phone against the window glass and rest your hands on it to keep the phone still during the measurement. The head should also not move while moving. You only need minimal finger movements in the left or right area of the screen to operate the program to get an accurate measurement.

Check the scale

A faintly visible grid is applied to the screen. This is used to keep your head as still as possible in relation to the phone by referring to it. It is also used to check that your phone is zooming correctly. One cell in the grid corresponds to a size of 10 x 10 mm. Please check this size before you start measuring. You can only get an accurate result if the scale is correct.

Measurement procedure

Step 1 of PD measurement

Step 1

1️⃣ Close the left eye and align the measuring line exactly with the center of the right pupil

Step 2 of PD measurement

Step 2

2️⃣ Close the right eye and align the measuring line exactly with the center of the left pupil

3️⃣☝️Double check! Alternately close one eye and the other eye one after the other and check or the lines are still exactly aligned with the center of the pupil of the open eye. It is important to do this so that minimal movements during the measurement do not corrupt the measurement. If necessary, move the rulers slightly to maximize the alignment. Accurate aiming is very important for accurate measurement.

User interaction

PD Meter control areas
PD Measure Touch Gesture
PD Measure Touch Gesture

How to align

Pupillary Distance PD Measure Right Eye

Right eye

1. When pointing at the right eye, the left eye should be closed

Pupillary Distance PD Measure Left Eye

Left Eye

2. When pointing at the left eye, the right eye should be closed

PD distance measure left and right eye warning

⚠️ Warning

If both eyes are open, the lines may be blurred and appear unaligned.

Do not align with both eyes at the same time !!!

⍻ Double check

If you are double checking correct aiming, close the left and right eyes alternately and check whether the other eye is aiming correctly. 

Keep your head completely still at the same time!