"Jono" wrote in message
om...
Hey,

I was applying for a job as an ATCO, and have been given an invitation
to the selection day, however on the application form there was lots

In the US there are several standard tests that may be use in place of the
Ishihara test when administered by an authorized person. One of these is
the Farnsworth lantern test. Check out
http://www.aviationmedicine.com/colorvision.htm#stds or Google for more
info.

It looks like UK pilots who fail the Ishihara test have the Holmes-Wright
lantern test as a fallback. Check out
http://www.optometry.co.uk/articles/...04/Chorley.pdf

Peace and Goodwill,
John Severyn KLVK