Indiana Bureau of Motor Vehicles lets me drive without glasses but I can hardly make out the numbers on my digital watch. Middle-aged eyes. OK distance vision but can barely see my cyclocomputer. I've found progressive addition glasses lousy for cycling; they don't keep out the wind at speed (downhill). All the ads for prescription insert cycling glasses say "single vision lenses only". So, I've worn cheap safety glasses from the home improvement centers for several years, tinted/clear, day/night. Carrying real glasses. Until just recently, when I found some bifocal "fishermen" sunglasses for less than $20! Anything else out there on the market?