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  1. So I have been wondering what it would be like to have blindness or weakness to a colour in addition to being on the spectrum. While many of you may have heard that colour blindness is quite common, in fact it's weakness to a colour, usually green (Deuteranomoly), that's very common. I would suppose that any symptoms that have to do with colour would be different. The ishihara test, the most popular colour discrimination test, is so sensitive that even some who never have real world problems indentifying colour may still fail the test. If you have many real world problems identifying colour, you would have realised early on in life. Is it true that those with even a slight weakness to red (protanomoly) would also realise early on the life? I believe it greatly reduces the ability to see red lights, making them darker, even without casuing any other real world problems identifying colour. These include brake lights on vehicles and port side navigation lights on aircraft and vessels. Just as there are advantages to the autistic mind, anamolous trichromacy actually increases the ability to distinguish certain colours, such as yellows, tans and shades of khaki in case of deuteranomoly and (I believe) protanomoly. I would imagine that weakness to blue (tritanomoly) increase the ability to distinguish colours in the yellow-green-blue region. Green on both road traffic lights and on railway signals looks more green than blue to me? It is any different for the green-weak? So what is it like for someone with Asperger's in addition to blindness or weakness to a colour when they do normal colour vision tests?

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