I posted the first parts of these about two years ago.  My wife and I
have had valid driver licenses for 40 years.  Two years ago, both my
wife and I failed the vision screening.  We had to have an eye doctor
examine our eyes and fill out a form.  Then we had to take a driving
test to prove that we could drive with only one eye.

We were both told that this was a one-time process, and we wouldn't have
to repeat it ever again.

A month ago, I got a letter from the DMV, saying that I needed to renew
my license, and I needed another form from an eye doctor plus a driving
test.  So I went to the DMV to argue with them.  That didn't work.  The
woman was very nice, but she didn't know anything and didn't do
anything.  Only "THEY" knew why "THEY" had sent that letter, and "THEY"
always had good reasons for what they did.  All that she knew was that
unless I coughed up the form, "THEY" weren't going to process the
renewal.  As for the driving test, that depended on what the doctor put
on the form.  So I got a blank form.

It's a US$10.00 copay to see a doctor at my HMO, so that wasn't a
problem.  I hadn't seen an OD in two years, so it was time anyway
(although I had seen three OMDs, one numerous times).  So I made an
appointment.

I decided to read the form more carefully this time.  There was a
section for me to fill out, and a much larger section for the eye
doctor.  As I got to the bottom, I saw the problem.  On the first form,
my OD checked the box to say I needed to be rechecked in two years, even
though he had checked the other box saying I was stable.  The
instructions on the back were clear that whatever he checked, that
defined the term of my license.

I saw the OD, and he confirmed that I only used one eye, and that eye
required no correction for distance.  I made sure he didn't check that
two year box.

I went back to the DMV, thinking that everything was cool.  The clerk
didn't know what buttons to press on her computer, and had to go for
help.  I had already paid for five years, so she didn't know how to
enter my renewal without specifying a fee.

I was sent to the picture line to get a picture, a thumbprint and have
the vision screening.  The clerk wanted me to put on my glasses.  I
explained that I didn't bring them and didn't use glasses.  She pointed
to the form, where it said I was 20/50 uncorrected in the right eye, and
20/25 corrected, and explained to me that it meant the doctor said I
needed to wear glasses to drive!  So she went ahead and tested me
uncorrected.  Now, the way I get 20/25 in the right eye is to keep
turning my head around and waiting for the letters to come into focus.  
When I got my head in a certain position, everything came clear.  I
suspect that I was looking around the edge of some lens in the machine.  
Whatever.  She said I passed, and didn't need a driving test.

I got my new license in the mail last week.  It's good for three years.