Colour deficient (colour blindness)

Ronald Avy


I am going to pop into a recruitment office this next week to start the processes of an application to the Navy.

I am colour blind - but going for a branch with CP4 standards. Does anyone know of any national chain of opticians that does the lantern test and possibly the wires test? I can't seem to find any information about what the test actually is online....

I know I can't really practise it but it would be good to find out if I would pass it at some standard - so I know whether I should or should not get my hopes up.


War Hero
The military colour perception standard is unlikely to be conducted by civilian opticians unfortunately.

I think Specsavers maybe able to conduct the Ishihari (coloured dots) test, but I don't believe they are able to grade it to military standards.

If you can correctly identify basic red, green, yellow and blue stationery tabs in daylight, you are more or less CP4 or better - or so legend has it.


Ronald Avy


I think I am looking at the RN Reserves route alongside my current role. Do you know what the colour perception requirements are for that role? or is it the same as RN (Regular) where I just choose the branch where I serve as a RNReserve