Hey, I haven't posted here in a while and ironically found this.
hey dude, Im an eye doctor.
20/20 and 6/6 are nothing more that ratios used to measure the vision. They are a level, not a prescription.
For instance, think of 20/20 as 6,000 feet. Almost any airplane can easily reach 6,000 feet.
BUT that can use all sorts of varying POWER or engines to get to 6000 feet. Think of this power as your Prescription. Confusing still?
I digress. 20/20 and 6/6 are equal. They are nothing more that a RATIO...
20/20 = 1 = 6/6
20/40 = 0.5 = 3/6
20/60 = 0.33= 2/6
they are all just ratios, not absolutes.
So most of the patients I say today, they all read the SAME 20/20 line of letters, yet the higest Rx I found today was -7.25 and the lowest -0.50. Get it?
Forum moderator 2001-2010; He's a pedantic, pontificating, pretentious bastard, a belligerent old fart, a worthless st