Anyone here colour blind or know much about it?

The reason I'm interested is this.

On this online test ...
http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
... when looking at static images, I see nothing at all (or really struggle) 
on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if I use my 
arrow keys to scroll the page, the images reveal themselves to me.

I imagine this could be some quirk of the way the computer monitor works ... 
or a fact about colour blindness which I'm not aware of ... but I couldn't 
find anything referencing this behaviour and I'm not sure where to look.

From this site I reckon my condition is "Deuteranomaly (green-weak)"
http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-blindness/

Anyone got any info or bright ideas on how to get some?

Ta,
Steve W

"FatBoySlimFast"  wrote in message 
news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...

> I imagine this could be some quirk of the way the computer monitor works 
> ... or a fact about colour blindness which I'm not aware of ... but I 
> couldn't find anything referencing this behaviour and I'm not sure where 
> to look.
>
> From this site I reckon my condition is "Deuteranomaly (green-weak)"
> http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-blindness/
>
> Anyone got any info or bright ideas on how to get some?

I use a 40" TV and all the grid stuff showed ok for me. I got some of the 
other tests wrong and result a deuteranomally indicator of 29%, whtatever 
that means (a green shift to the red AFAICS).

icarusi
--

remove the 00 to reply

FatBoySlimFast wrote on 16/9/09 23:37:
> Anyone here colour blind or know much about it?
> 
> The reason I'm interested is this.
> 
> On this online test ...
> http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
> ... when looking at static images, I see nothing at all (or really 
> struggle) on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if 
> I use my arrow keys to scroll the page, the images reveal themselves to me.
> 
> I imagine this could be some quirk of the way the computer monitor works 
> ... or a fact about colour blindness which I'm not aware of ... but I 
> couldn't find anything referencing this behaviour and I'm not sure where 
> to look.
> 
>  From this site I reckon my condition is "Deuteranomaly (green-weak)"
> http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-blindness/ 
> 
> 
> Anyone got any info or bright ideas on how to get some?
> 
> Ta,
> Steve W

Probably worth popping into an optician assuming you have got a decent 
screen (the images are rock solid and obvious on my flat screen).

About 8% of men are colour blind (an X-Y chromosome thing), and 
deuteranomolous is the most common - which means that you are not 
specifially blind to a colour but you have some problem interpreting - 
in this case red/green (you mihgt mix up purple with brown for example). 
It is extremely rare to be completely colour blind to a colour (there 
are people who cannot see red traffic lights for example) and the usual 
side effect is that you mix up colours or have famously bad taste! It is 
usually genetic and rarely a problem unless you wanted to be an airline 
pilot.

I think the scrolling effect could just be that causing your screen to 
temporarily display the shapes in different colours. However, your eyes 
also have an effect that if you stare at the same thing for a long time 
then they disappear, so if your vision is weak, moving the picture 
around can help your eyes form a stronger picture and help the brain 
interpret what is going on.

Assuming you are over 18, I'd say it probably is worth popping into an 
optician because I'm surprised you could get to adulthood without having 
picked up you were colour blind (especially to the extent that you 
couldn't do nearly all of the red/green tests).

It is most likely nothing serious and of course it might simply be that 
it is a crappy test for you on your screen, but there is a small 
possibility that it might indicate that you have acquired some issue 
with your eyes. Certain problems like diabetes often show up as eye 
problems, and there are other symptoms to check for. If you are older, 
then it could hint at some form of degeneration (though I still think it 
is unlikely).

(I did a year of ophthalmic optics before deciding I didn't want to sit 
in a cupboard for the rest of my life, and I am a guide dog puppy 
walker, so I've come across more than the normal number of people with 
eye trouble, but I also know enough that I wouldn't rely on anything I 
type here, so go and see someone who should be reliable).

Spenny

On Wed, 16 Sep 2009 23:46:50 GMT, Ian Spencer
 wrote:

>FatBoySlimFast wrote on 16/9/09 23:37:
>> Anyone here colour blind or know much about it?
>> 
>> The reason I'm interested is this.
>> 
>> On this online test ...
>> http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
>> ... when looking at static images, I see nothing at all (or really 
>> struggle) on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if 
>> I use my arrow keys to scroll the page, the images reveal themselves to me.
>> 
>> I imagine this could be some quirk of the way the computer monitor works 
>> ... or a fact about colour blindness which I'm not aware of ... but I 
>> couldn't find anything referencing this behaviour and I'm not sure where 
>> to look.
>> 
>>  From this site I reckon my condition is "Deuteranomaly (green-weak)"
>> http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-blindness/ 
>> 
>> 
>> Anyone got any info or bright ideas on how to get some?
>> 
>> Ta,
>> Steve W
>
>Probably worth popping into an optician assuming you have got a decent 
>screen (the images are rock solid and obvious on my flat screen).

(snippage of good advice you've read already)

My first thought was also - ask an optician. It'll cost you whatever
the basic is for an eye test so pick one offering a deal.

I can't see red lights either, but they won't let me drive anymore so
it doesn't matter. Unfortunately my wife can, and she has the same
problem....

Pete

On Sep 17, 12:37 am, "FatBoySlimFast"
 wrote:
> Anyone here colour blind or know much about it?
>
> The reason I'm interested is this.
>
> On this online test ...http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
> ... when looking at static images, I see nothing at all (or really struggle)
> on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if I use my
> arrow keys to scroll the page, the images reveal themselves to me.
>
> I imagine this could be some quirk of the way the computer monitor works > or a fact about colour blindness which I'm not aware of ... but I couldn't
> find anything referencing this behaviour and I'm not sure where to look.
>
> From this site I reckon my condition is "Deuteranomaly (green-weak)"http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-bli...
>
> Anyone got any info or bright ideas on how to get some?
>
> Ta,
> Steve W

I'd be very cautious about visual self-diagnosis tests on the web.
Most monitors are very poorly calibrated and somewhat random,
especially the cheaper ones.  It's very expensive to buy a fully-
calibrated colour screen.

"FatBoySlimFast" wrote in message
> On this online test ...
> http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
> ... when looking at static images, I see nothing at all (or really 
> struggle) on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if I 
> use my arrow keys to scroll the page, the images reveal themselves to me.


do you use a TFT monitor? if so I wouldnt worry ( see other posts)
if in doubt, go and see an optician.

I did the test on a CRT monitor:
Estimate of color vision deficiency's probability:0%


-- 
no66y©

"FatBoySlimFast"  wrote in message 
news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...
> Anyone here colour blind or know much about it?
>
> The reason I'm interested is this.
>
> On this online test ...
> http://www.opticien-lentilles.com/daltonien_beta/new_test_daltonien.php
> ... when looking at static images, I see nothing at all (or really 
> struggle) on tests 2, 5, 7, 9, 13, 18, 22, 23, 29 and 30 ... and yet, if I 
> use my arrow keys to scroll the page, the images reveal themselves to me.
>
> I imagine this could be some quirk of the way the computer monitor works 
> ... or a fact about colour blindness which I'm not aware of ... but I 
> couldn't find anything referencing this behaviour and I'm not sure where 
> to look.
>
> From this site I reckon my condition is "Deuteranomaly (green-weak)"
> http://www.colblindor.com/2007/04/17/deuteranopia-red-green-color-blindness/
>
> Anyone got any info or bright ideas on how to get some?
>
> Ta,
> Steve W

I scored all correct and the images and colours were clear enough on my 
screen for no doubt.

Andrew

"FatBoySlimFast"  wrote in message 
news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...
> Anyone here colour blind or know much about it?

No, but I was just reading this:

http://news.bbc.co.uk/1/hi/health/8255112.stm

Probably be a good few years off but there's [coloured] light at the end of 
the tunnel!

Bigus

"FatBoySlimFast"  wrote in message 
news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...
> Anyone here colour blind or know much about it?

Oops. Sorry guys. Should've said. I am colour blind. I know that from a test 
at school 25 years ago. The BBC news item got me interested.

I'm a bit red/green colour blind. It's never caused me much difficulty. One 
problem I do have is mis-naming colours ... sandy colours are the worst. But 
it's more a curiosity than a cause for any real problem. I'm only affected a 
bit.

It was the odd effect of the moving image that surprised me.

Cheers,
Steve W

"FatBoySlimFast"  wrote in message 
news:T7-dnQCWsdSNKS_XnZ2dnUVZ8kqdnZ2d@brightview.co.uk...
> "FatBoySlimFast"  wrote in message 
> news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...
>> Anyone here colour blind or know much about it?
>
> Oops. Sorry guys. Should've said. I am colour blind. I know that from a 
> test at school 25 years ago. The BBC news item got me interested.
>
> I'm a bit red/green colour blind. It's never caused me much difficulty. 
> One problem I do have is mis-naming colours ... sandy colours are the 
> worst. But it's more a curiosity than a cause for any real problem. I'm 
> only affected a bit.
>
> It was the odd effect of the moving image that surprised me.

Maybe it's a drummer thing, Steve?
Our drummer, Mike, is also red/green colour-blind.
He bought his wife a new car a few years back, which he thought was grey.
It was actually a "shocking pink" hue, which, luckily, she didn't mind, 
after all.

George

FatBoySlimFast wrote:
>
> Oops. Sorry guys. Should've said. I am colour blind. I know that from a test
> at school 25 years ago. The BBC news item got me interested.
>
> I'm a bit red/green colour blind. It's never caused me much difficulty. One
> problem I do have is mis-naming colours ... sandy colours are the worst.

I have exactly the same thing, but don't "suffer" in the normal world,
I just can't do those spotty book tests. I had to have a (very
thorough) eye test once and went through the whole book of about
50 plates. At the end the doctor said: "You didn't do too bad, you
got 2 right."

I have to declare my colour-blindness on my (motorcycle) race licence
but can distinguish between the red and green flags without problems,
which was all they (the ACU) were worried about.

I took that online test and only got 2 wrong. Some were quite
difficult
to see and the multiple-guess answers helps in a couple of cases, but
my result was "deuteranopia", aka red/green deficiency, as expected.

--
Antony

FatBoySlimFast wrote on 17/9/09 23:11:
> "FatBoySlimFast"  wrote in 
> message news:17idnZrw3sg29SzXnZ2dnUVZ8nSdnZ2d@brightview.co.uk...
>> Anyone here colour blind or know much about it?
> 
> Oops. Sorry guys. Should've said. I am colour blind. I know that from a 
> test at school 25 years ago. The BBC news item got me interested.
> 
> I'm a bit red/green colour blind. It's never caused me much difficulty. 
> One problem I do have is mis-naming colours ... sandy colours are the 
> worst. But it's more a curiosity than a cause for any real problem. I'm 
> only affected a bit.
> 
> It was the odd effect of the moving image that surprised me.
> 
> Cheers,
> Steve W
There are two variations of colour-blindness (ignoring the colour issue 
itself) - when you have anomalous vision and when you are blind to a 
colour. Being totally blind to a colour is very rare. Oddly, those who 
are completely blind to one colour can still identify those that they 
can see correctly, but those with an anomaly mix up colours. This is due 
to the pigment in the retina not reacting correctly. My sister-in-law is 
colour blind (less than 1% of women are colour blind) and she has 
problems with browns and purples (eeek!).

I'd guess you can see the scrolling effect either due to the screen not 
handling the colour correctly, or because the movement is stimulating 
the retina in a different way. I suppose the way to find out is to print 
off the tests and see if jiggling about makes them appear. In fact to 
see properly, your eye tends to move, and if you stare at something with 
a deliberately fixed eye position, you will see odd effects as the 
pigments in the eye don't refresh quickly enough.

Anyway, pleased to hear you are colour blind! As you say, it's no biggie 
and rarely causes any real problems, just pleased to know it is not 
something that has recently appeared, because that would have been a bit 
more of a worry.

Hmm, what else? You actually have only a relatively small amount of 
colour vision, concentrated in the centre of the eye - these are the 
cones of which there are relatively few away from the centre. The rods 
are monochromatic vision and cover the periphery - but are far more 
sensitive in low light. You can test this when wandering around in the 
dark - when you try and see something feint, look slightly away from it 
and you may be able to see it more clearly. So at night, your vision 
will be as good as anyone else.

The other interesting thing about vision is how the brain makes you 
believe you are seeing everything in great detail, but if you 
concentrate, you discover there is only a small amount of your vision 
that is detailed, the rest is just made up. For example, look at say the 
F on the keyboard from about a normal distance, and then, without moving 
your eyes, try and read the numeric keypad - you know it is there, but 
you should realise that you can't actually see what is written on the 
keys (that until then I am sure you thought were well defined).

Spenny