Golden acrylics

If I remember rightly, from my work in school medicals where they test children early for colour blindness, it actually only affects boys. Usually is is the red and green that are affected, but I am sure it is possible to be totally colour blind although this is probably rare. Colour blindness itself is not that unusual - we would find about one boy in each year group would suffer from this condition.

Colour blindness is an X chromosome [recessive] related deficiency which readily shows up in males [XY]...from a carrier X female [XX]...a bit complicated BUT female colour blind persons are possible...I have worked, over the years, with two ladies with this RED/GREEN colour blindness...one was a Pharmacist...[I was her 'colour confirmation officer']... A colour blind female is the offspring of a colourblind father and a carrier [normal colour perception] colour blind mother... But remember we all have a unique colour perception... Try describing a colour over the phone to an artist friend and get them to paint it...and see what you get...we could all look at section of the same painting and walk away, each, with a different perception [how we see it] of its colours... The old standard coloured dots [ forming/not forming numbers] test is the Ishihara Test... So STOP is at the top...Go is at the bottom...and some colour is in the middle perhaps?