[jaclaz]

Maybe is too simple, but this approach:

https://www.youtube.com/watch?v=aNjpH5lBZ8w

go to around 1:09 in the video seems to me very practical if one wears glasses, otherwise one could use a similar approach with el-cheapo protective glasses or "over glasses" safety glasses.

From experience with wearing "magnifying lenses" for little works with high precision like these:

https://rukminim1.flixcart.com/image/832/832/magnifier/a/h/n...

the front strap is very uncomfortable/sweaty, so the issue, besides the design (and making DIY one similar to Apple's one but with more standard round holes is easy) is with the material that must be anallergic and prevent or absorb sweat.