Does anyone know anything about colour blindness? DS1 (5yo) is possibly colour blind, but I am confused....

[NatalieJane]

Do you always see the same colours wrong, i.e. does red always look green or black always look yellow? (No idea if those are the colours that would get mixed up, they are just examples.)

He has had his eye tested today, no glasses needed but she wants him retested in 6 months for colour blindness, what I don't understand is that he has known all his colours since he was 2yo, so have we taught him that what he sees as green is called red? Or doesn't it work like that?

Is anyone following this??! Helllllllpppppppppppppp please

I don't know a lot about it but iirc the problem is not with seeing colours but distinguishing one colour from another when they are together - for example being able to see and read green writing on a red background.

my dad is red/green colourblind
hdoesn't see red or green at all
so his world is different shades or grey basically
he can see some very bright yellows

my friend can only see in shades of grey, black and white..she isnt allowed to drive as it affects her sight so much..

Ooooooohhhhhhhhhhhhhhh, so it isn't that he sees the colours wrongly, as such, at all.

Does anyone know if it can run in families, only since telling my mum she has piped up with 'oh my Dad was colour blind' which I never knew.

Am I right in thinking that it doesn't really affect him in any way, only that he won't be able to see certain colours together?

Oh sorry x posts with the last two....

I don't think his being able to see colours can be that affected, as I say he will tell me that red is red, green is green, that's why I thought that we had sort of taught him the wrong word for the wrong colour.

God I am making no sense at all.

It does run in families, and it's recessive and X-chromosome linked so more common in boys (as they only have the one X-chromosome so one copy of the gene is affected they don't have another "normal" one to cancel it out). If your mother's father was colour blind then she would have been a carrier (as he would have passed on his X-linked gene to her) and there's a 50% chance that she'd have passed on her affected X-linked gene to you (which would make you a carrier) and then if you are a carrier a 50% chance that you'd pass on the affected gene to your DS.

It varies in how it affects people -- there are different types. Some can only see in monochrome, effectively (that's more rare) while others just can't distinguish two particularl colours (typically they confuse red and green, or blue and yellow) but there are other variants.

There are 2 dif typesw of common colour blindness. One is red/green and I can't remember the other (uni was a while ago!). Bascially it doesn't mean that he sees greys or anything like that, it will just mean that he won't be able to distinguish the two colours from one another. The test ususally involves showing a card with (for eg) a background of greeen dots with a sqaure of red dots in the middle and asking what shape is shown on the card. A colour blind person will just see dots as all the same and won;t see the square. I'm sure if yougoogle this you'll find egs of the tests.

Yes sweety, she showed him a book with coloured dots, and he had a pair of glasses on with one red lens and one green lens, she showed him 5 pictures and he only found 2 of 5 shapes she asked him to.

Thanks for the info everyone, it has really helped me understand it all a bit better.