Originally Posted by jrock
the ishara(spelling?) test has been proven inaccurate.
the magnant\peg test from eye doctor is "the" test.
border patrol\navy are jus 2 major agencies that allow you to use results of said test to override failed ishara test.
it costs @$100 from eye dr.
The "magnet" test comment made me chuckle. I believe you're talking about the the Farnsworth "D-15" test. That is different from the Navy's use of the "Farnsworth Lantern (FALANT) light test." the FALANT is the standard Navy color perception test.
To the OP, if you can't pass either the Ishihara 14, 24 or 38 plate pseudoisochromatic test plate, one alternative is the "Dvorine 2nd edition, 15 plate" test. A failure is considered missing 7 or more plates on that test. It's also generally considered a slightly easier test to pass than the Ishihara pseudoisochromatic test plates.
My friend went to the Southern California College of Optometry (Fullerton, CA) and got a letter from a doctor there, stating that he passed the Dvorine test. A large police department in Cali accepted his letter in lieu of him taking the ishihara test. He failed the ishihara test by one test plate.
Most doctors don't have the Dvorine plate test book because it's out of print, so you might have to do your homework on finding someone with that test. Now, many eye doctors (opthamologists, not optometrists) are switching over to the "Richmond-HRR 4th edition" pseudoisochromatic test plates. Many government entities such as the FAA have acknowledged and accepted that the most accurate and quickest color vision test is the "Richmond-HHR 4th edition" pseudoisochromatic test plates.
You might inquire with an eye specialist if they have that test and if the LE agency you seek employment with will accept that test as an alternative to the ishihara tests. I'll tell you from personal experience, my son has taken several color vision tests and found that the HRR 4th edition to be more difficult than both ishihara and Dvorine. Remember however, everyone's eyes are different.
*****Bottom line.... DON'T GIVE UP! There are acceptable alternatives to just the "one" color vision test. Specifically those damn dot-numbered tests (Ishihara) that so many people anguish over. You just have to find the right test a future employer will accept.*****
On a side note, my old college room mate failed the LAPD medical screening test. They told him he had a heart condition and his career aspirations to being a cop were over. Not satisfied with that answer, my buddy appealed and he went to a cardiologist who administered some medical tests. The cardiologist said my buddy was fine and wrote a letter stating that he could perform the normal duties of a police officer. My point is, there are options and appeals for all sorts of things, including color vision.
Just for general information and in case you're wondering, here are the acceptable "pass/fail" requirements for the three main color vision tests we're discussing (Ishihara, Dvorine and Richmomd-HRR 4th):
Ishihara pseudoisochromatic plates:
Concise 14-plate edition: six or more errors on plates 1-11; the 24-plate edition: seven or more errors on plates 1-15; the 38-plate edition: nine or more errors on plates 1-21.
Dvorine pseudoisochromatic plates
(second edition, 15 plates): seven or more errors on plates 1-15.
Richmond-HRR, 4th edition:
two or more errors on plates 5-24. Plates 1-4 are for demonstration only; plates 5-10 are screening plates; and plates 11-24 are diagnostic plates.