thanks iv never heard of a blue card ???
here in my state (could be the same card in all states, but maybe a different color), it has the same information as the DOT med form.
the eye doctor (or specialist) jots down the numbers from your exam, thanks in part to the computerized equipment they have nowadays.
NO ONE disputes that "blue card" from the eye doctor.
i was once told by my now retired eye doctor, "if anyone at the DMV says this card is no good, or i still have to take the eye test at the DMV, you call me right away"....
never had to call him......
the DMV simply takes the blue card, and enters it into my information at license renewal time. the DOT doctor simply staples that, to my long form, for his file. he then just writes down the information for my personal record, and i get a new DOT med card.
easy-peasy....
BUT...an eye doctor or specialist, may charge more than your primary care doctor.....well worth it, if you have a problem, or are at least borderline with your eyesight, under the DOT rules.
if you are borderline (let's say), the regular hanging wall eye chart will trip you up...the lighting might be dim, you may be a bit too far from the line you're supposed to be standing on, etc.
no way to trip up a computer eye exam.....you either pass, or don't....!!!!!!
plus you get checked for glaucoma, macular degeneration, etc,etc......well worth the fee you pay