Colour blindness stuff.

P

Paige

New member
Snee said:
the second one is totally clear for me. True story.

colorblind_test.jpg


red_blind.jpg
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i can see both, does that mean I have eye aids too?:unsure:
 
Chip Monk said:
Both of my brothers are color blind, one seriously so, the other slightly. As the chaps said it's much more common in men than women and is almost certainly passed from your maternal grandfather.

I was tested in school and at that time, though it was rather a long time ago, I showed no signs of colour blindness. My brother who has it to the max cannot tell the difference in colour between a red andgreen traffic light. True Story.
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Although the red one is usually at the top non?

I can see the 6 and the 56 but the one in the middle looks like a map of the Milky Way - I see nothing but randomness.
 
* In protanopia the visible range of the spectrum is shorter at the red end compared with that of the normal, and that part of the spectrum that appears blue-green in the normal appears to those with protanopia as grey.
* In deuteranopia the part of the spectrum that appears to the normal as green appears as grey. Purple-red (the complimentary colour of green) also appears as grey.

* In protanomalia and deuteranomalia, no part of the spectrum appears as grey, however the part of the spectrum that appears to those with protanopia as grey will appear as a greyish indistinct colour to those with protanomalia and similarily, the part of the spectrum which appears grey to those with deuteranopia will appear as an indistinct greyish colour to those with deuteranomalia.
As a result of this red-green colour vision deficiencies show blue and yellow colours clearer than red and green colours.

* Those who suffer from typical total colour blindness show a complete failure to discriminate any colour variations, usually associated with impairment of central vision with photophobia and nystagmus.

* With atypical total colour blindness, the sensitivity to red and green, as well as to yellow and blue is so low that only very clear colours may be perceived. There are, however, no further abnormalities in the visual functions.
 
In April of 2001, while discussing with a close friend of mine Nick Yee, who is red-green colorblind, the differences in our subjective visual experiences, we realized that color vision is not an unequivocal gain. That is, in some situations, he could perceive variations in luminosity that I could not. This difference got us to thinking whether we could design a "reverse" color blindness test - one that he could pass because he is color blind, and one that I would fail because I am not.
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the second one is totally clear for me. True story.

colorblind_test.jpg


red_blind.jpg



I like reverse tests way better, 'cos that way I'm winning, like.

Moar.

reverse_ishihara.gif
 
I can see how tests designed to weed out that would give me trouble, then. I've got problems differentiating between some nuances. I don't think any colours turn grey or indistinct or owt for me, though.

I can see extremes, and primary colours. Can't really see exactly where blue ends and green begins, and where green ends and yellow begins and that kind of thing, I'm inaccurate rather than oblivious of colours, if that makes sense. In some cases It has been as if my colour-perception has been shifted towards one end of the spectrum, compared to what other people have seen.

So what I'm saying is that I can tell if something has a colour, I guess. Just not always which the correct one.
 
J-dye said:
i cant see any numbers or words. i mean its just colours . right ?

am not color blind but this is weird :dabs:
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It's people who are colour blind who are more liable to see them. Your eyes can differentiate between the different colours, theirs cant so they see similar colours or shades. This makes up the numbers or words that you can't see. You can't see them because they aren't really there. Sans the condition obviously.

Bearing in mind that there are different kinds of colour blindness. It's Red/Green in my family. My brother for example always had to ask someone to check his socks because he could see a pair when in fact they were a different colour.

There are other tests where you will be able to see numbers which they cant, because of their condition again. You see a number but they don't because the colours which you see as different and make up the number, they cant see that difference.

That's my understanding anyway. It may obviously be pish.
 
Snee said:
So what I'm saying is that I can tell if something has a colour, I guess. Just not always which the correct one.
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That's by far the most common thing as I understand it. In spite of the fact that people think of colour blindness as not being able to see colour. I think the name may be unhelpful.

The way my brother explained it to me was that for what I perceived as red and green he saw different shades of the same colour. He could almost have called it gred and it would have made more sense to him. Hence the sock thing. 2 socks could be entirely different, one red and one green. However if their shades were similar he would see them as the same.
 
Mr JP Fugley said:
That's by far the most common thing as I understand it. In spite of the fact that people think of colour blindness as not being able to see colour. I think the name may be unhelpful.

The way my brother explained it to me was that for what I perceived as red and green he saw different shades of the same colour. He could almost have called it gred and it would have made more sense to him. Hence the sock thing. 2 socks could be entirely different, one red and one green. However if their shades were similar he would see them as the same.
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For me one of the socks would have to be a bright yellow and the other a very yellow green, like, for me to mix them up, for instance.

And even then I'd probably be able to see they were different, but I might not be able to tell which was which (might even end up seeing the yellow as lime green and the other as yellow).

It's that close, for me. Yet I'll invariably mess up most tests.

But like I said, I started off as being able to see colours normally, was tested when I was little. The most likely culprit is a virus, as I said, which may account for any oddness in my condition :unsure:


It might even be to do with the angle with which I'm looking at stuff, possibly. Not really something I've bothered to explore.
 
I thought I could illustrate by turning it monochrome, but it turns out the pattern just diappeared for me, then. Odd.

It's not so much an "0" as it is a perfect circle.

As for your 56, I can't see that at all.
 
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