the beauty of averages
anyway, one of the biggest problems i have is with safety glasses. my prescription ones are clunkers, and the "over the glasses" type are really unwieldy. so what's a guy to do? why, look up "bifocal safety glasses" in my favorite catalog. here's the description, cut and pasted from the catalog:
Magnifying Wraparound Safety Glasses
* Our bifocal safety glasses bring items into focus while protecting your eyes
* Frame and temples are polycarbonate
* A rubber nosepiece and temple tips provide comfort
* Temple length is not adjustable; temple-to-temple width is 5 1/2"
* Lens is scratch resistant
To select the correct magnification level (also known as diopter), subtract 35 from your age and insert a decimal point between the two numbers. Choose the magnification level that is closest to that number.
did you catch how to figure out what diopter to order? optomotrists world wide must be rolling over wondering why they just got the cold sweats.
crazy thing is, i actually ordered using the formula, and i'll be damned if it isn't close enough to work. i have to get in close, around 12 to 14 inches to correctly focus, but that is the distance i need when i need the bifocals anyway.
so now i'm wondering if they sell other items using the same types of "rule of thumb" instructions. i'll have to poke around the catalog in my free time.
this just cracks me up..