Sylvain wrote:
...
if you succeed one of these tests, then you get a letter from
the FAA saying that you have passed one of the acceptable alternative
test, and you present this letter to the AME everytime you renew
your medical (it is valid for all classes of medical unlike a SODA
which can be limited to a given class);

in summary: talk to AOPA and don't worry too much. Oh, and
a good read on the subject:

http://www.aopa.com.au/infocentre/to...lourvision.pdf

--Sylvain

I received a SODA for color blindness back before waivers were issued
for a color light gun test. It is limited to a 3rd class medical only.
What would be necessary to convert this SODA to a waiver that could be
used for a 2nd class medical?

Thanks in advance!
~Ken