To apruneuk
Hmmm, this amendment seems to be a step in the right direction. But is this really a relaxation?
The Ishihara plates test for colour deficiencies, the most common being a red-green colour deficiency. As I understand it, pilots need to distinguish these colours more than any others. The end of the book deals with blue-yellow dificiencies which is very rare in people. So by presenting the first 15 plates in random order it still 'weeds out' most colour deficient people, because they should be able to see the last section of plates anyway.
A more 'hands on' test is needed in my humble opinion.
In answer to your question, I'm sure CAA are getting the Beynes Lantern very shortly. I think they still do the Anomaloscope test in Germany but I maybe wrong. The Anomaloscope is a very hard test if you are colour deficient. You look through an instrument similar to a microscope.. .You see a coloured semi circle and you have to match the bottom half to the top half colour. It is then measured on a scale. You can have an error of about +/- 4 on the scale. It is considered a very accurate test. Most people who fail other more relaxed colour tests also fail this one.
I do not know where you can get the other colour tests done.
Regards
Ice
P.S. If any of the information is wrong, someone please correct me.
[ 27 January 2002: Message edited by: icebox ]</p>