Do you know anyone who drives a car? Do you drive a car yourself? If you are a driver you may recall that in order to get your driver’s license you had to pass one test having to do with your visual ability. You had to read the letters on the wall or in a fancy box to measure your eyesight or visual acuity. Passing that single test meant that you could see at least 20/40 (in most states), which means being able to see a 2/3” tall letter at a distance of twenty feet (20/20 means being able to see a letter half that size at the same distance). There are no other visual requirements for normally sighted people to get a driver’s license even though visually there is much more involved in being a good, safe driver.
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