I took the Titmus 2 Vision test and passed. Don't take the light gun signal until it is your last resort. The letters of evidence are no longer being issued as of July 24th. Any questions on this colorblind issue you can pm me.
Darren
Old thread with some new information. Darren is right about not taking the light gun signal test until it is the last resort. You'll be taking an exam using an uncalibrated instrument, shone through a filter (window and / or tint) of wildly varying and unregulated design, given by a medically untrained examiner.
If you "fail" the unregulated and unscientific "test" you will never have the chance to take any of the various other tests that will suffice if you cannot read Dr. Ishihara's plate book of torturous dots.
The Dvorine is also a plate book, but with some differences. Some of the plates have different color backgrounds surrounding each of the 2 numbers. It is generally considered much easier to pass than the Ishihara book, but maybe not as easy as the Farnsworth lantern test. That is a sweeping generality because there are so many different types and classifications of color deficiency.
The link above no longer works. After Pearson Education Publishing finished several mergers they quit printing the plates because they were unable to accurately reproduce the colors desired.
So Pearson went back to doing what they do best. Gouge students for exorbitantly priced online study materials which vanish after six months and make believe "new editions" of hard copy textbooks with the same exact text, but one or two extra pages of publishing fluff inserted after the flyleaf.
So it is impossible to order a new Dvorine book of plates. And nearly as impossible to find them used. Last edition was published in 1963 or 1964 perhaps?
Your best bet is to go to an AME who has spent the time and effort to collect as many of the allowable tests that they can find out there.
https://www.faa.gov/about/office_or...am/ame/guide/app_process/exam_tech/item52/et/
I would highly recommend Dr. Ray Steinhauser at OhioAME dot com. He has invested the time and expense in collecting numerous color vision tests acceptable to the FAA. Which means he understands intimately the tests available and requirements to get a successful color vision screening if that is possible for your condition. He has specific information on color vision testing on his website.