alt Hacker NewsIf they are replacing bifocals, the wearer needs both a near- and far-sighted prescription. Far-sighted only would never need these.
Either failure mode would be dangerous while driving because you need to be able to read your dash.
If they are replacing bifocals, the wearer needs both a near- and far-sighted prescription. Far-sighted only would never need these.
Either failure mode would be dangerous while driving because you need to be able to read your dash.
It's not a crisis if you cannot read your dash. How often do you look at the oil pressure gauge, for example? As for speed, just move with the traffic.