I made the data glasses work, but it was more a trial an error challenge. So I took a google crash course in optics.

First of all I had to understand the difference between a real and a virtual image with lenses. Then a very important thing is, that a human eye can only focus an object with a distance of min 25cm.

And all what I needed was this formula (1/f) = (1/s2) + (1/s1) where f is focal length of the lens s1 is object distance to the lens and s2 is the distance of the virtual image.

I will build now Version III based on this calculation.