Red green colour deficient vs Red green colour blind

[richb14]

Im red green colour decicient and one of my friends is red green colour blind. Whats the difference? Rich

[undercovers]

it used to be called colour blindness but as it is highly rare for someone to be totally unable to see a colour it is more correctly known nowadays as colour defective. So this is prob terminology development

[jno]

I suppose I'm red-green deficient - I often have trouble telling them apart, particularly dark reds and dark greens. But not always, so I can't really say I'm colour blind.

[Clanad]

In case you've never actually been tested, check here, jno fir the Ishihara test. It's still the gold standard for color perception testing...

http://www.toledo-bend.com/colorblind/Ishihara.html

[jno]

thanks Clanad - as I feared, I could make out the first one clearly, a couple of others dimly, the rest not at all. (I can distinguish traffic lights without trouble, however.) Sorry rich, this doesn't really answer your question - just mine!