Sworry I read the whole thread and determined you can’t add a focus mech to this. What did I miss? I was thinking I could cut out a section of old glasses and add that to output to focus for me. Guess contacts would be best but I don’t have any.
On addon lenses:
I don't believe contacts will work, as they are relying on the eyeball curvature to maintain correct shape and location relative to the pupil.
A bit on focusing (search around these posts for more):
True focusing can be adjusted if you are good and patient with tools. "Proficiency" not required though, hand tools would do just fine, as soon as your eyesight is close enough to normal, e.g. a (-2) myopia). Just carve both lenses' wells or add shims to them. If it worse you need a focuser mechanism. For that you can cut the casing (e.g. right in the middle) and and grind halves to make it shorter or add a spacer to make it longer after gluing all together (or you can add a threaded piece, or three extension bolts, or three setscrews, or guiding plank(s), etc). That's all. Nothing impossible just plenty of labor.
Edited by halx, 03 August 2020 - 12:39 PM.