[dosenbrot]

Without knowing if this has anything to do with these glasses I remember something called „in eye projection“. The trick is to create the image with a laser direct in the eye ignoring the focus distance, line a hologram. A quick search shows something like this https://www.osa-opn.org/home/newsroom/2018/october/optical_d... .

[baybal2]

Just have an eye projection made through some aperture narrowing lens system to flatten the depth of field