I am 62. Electronics is my day job but I have been learning some machining and CNC and taking some classes in the fall. My vision is corrected to 20/20 in both eyes but lack coordination between eyes for depth perception - hasn't been a problem flying (private pilot) and other things. I have "mono vision" glasses - near correction in one eye and far in the other. Apparently this isn't common in glasses but is common in contacts (my eye guy tried to explain why the difference but I didn't understand it). Anyway, that works well for me. I am going to be getting some prescription safety glasses and wondering what I should get for a prescription. I can ask the ophthalmologist for whatever distance makes sense. Wondering if a far prescription doesn't really make sense for the machine work so maybe a near and something like 6 ft correction? I would still need far for classroom work unless I sit in the front row. The difference between eyes and prescription isn't huge - I'm not blind at the other distance - just not completely clear. Any advice? Changing glasses occasionally is ok but would like to minimize that. My near correction is good from about 6" out to about 30" very clear and gradually worse beyond that so perhaps my existing near and far corrections are ok.