Several years ago I discovered that one of my major problems in cutting dovetails was that I couldn’t see well enough. My uncorrected vision is great at very short distance (e.g. marking and cutting dovetails) but lousy at distance. My problem is that any glass in front of my eyes decreases my ability to see details. I’ve tried bifocals, clear glass on the bottom, etc, but no lens is still the best. So I spent a lot of time taking glasses off, putting them on, taking them off, putting them on.
I think what would work best for me is find a pair of flip up glasses, like baseball players use for sun. My idea would be to have my prescription lenses in the flip up and have no lenses in the frame itself. Voila, flip down for distance and safety glasses and flip up for hand-tool detail work. My problem is that I can’t find any frames that allow prescription lenses for the flip up part. If you’ve dealt with this issue succesfully, I’d love to hear about it.