Video

USING SMALL SIZE DEVICES

For example in "iphone7" you have to scroll the page to access all areas

REAL SIZE DIAGRAM

On the results page hit the real size button , then put the frame on the diagram to check the position of the cross marks and other dimensions

WITH OR WITHOUT A FLASHLIGHT ON YOUR DEVICE

When you must select "Corneal reflex" or "Corneal center"

EFFECTIVE DIAMETER

How to use and adjust the diameter slider to get the minimum lens size required.

3D Print frame

How to assemble a 3d measuring devise