Here is something I came across at the AME's just last week at my renewal. He used a device for checking eyes called the titmus vison tester. It is a compact machine that checks visual acuity and colour vision. It contains a sheet with six ishihara plates on it. However the difference is that the plates are correctly lighted. I passed the titmus vision tester which is by the way acceptable to the FAA but right afterwards he checked me with the same ishihara plates in a book and I failed that test. I must obviously be on the borderline but the point is that if the ishihara test is administerd in ideal conditions borderline people like me can pass it.
here is the website of the manufacturer
<A HREF="http://www.titmus.com" TARGET="_blank">http://www.titmus.com</A>
what can the JAA have against such a machine?