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2FA presents a challenge for the bi/tri-focaled unless computer glasses are also bifocal. Which mine aren't.
Oh and don't talk to me about progressive lenses; that dog don't hunt for me.
@AskTheDevil Same. And for close work especially if varying body positions -- under or around equipment/desks/vehicles -- total non-starter. Dangerous sometimes.
@b4cks4w I tried progressive lenses for about a year. Nearly drove me mad. Basically, at any given distance you're looking at, you have this narrow band where you can focus, surrounded by blur. I was constantly bobbing my head back and forth and squinting, just so I could see some of what I was looking at clearly.