Slashdot Mirror

1. --snip-- [A]nd my color vision is actually better than most men's, it's actually better than most women's. I have on the other hand been to theaters that poorly maintain their equipment (Deer Brook Mall)

I'm just curious. By what metric can you make that claim? Every 12 months, I have to take this test, and I had a government agency administer this test during a job interview. I've never seen the FM-100, however.

http://www.toledo-bend.com/colorblind/aboutcb.asp

red-green colourblind too, and i've heard the same rumour. apparently it's not true, but then i believe (based on personal experience) that i do see better in the dark

perhaps I just like the dark...

I'm red/green color-blind. I can't see any numbers in these tests. I have no trouble differentiating between red and green lights when they're as big as traffic signals, or red and green when they are not tiny dots designed to cause interference patterns with people that are classified red/green color-blind.

This color-blind label does not mean we cannot tell the different between the two colors in real life. Heck, I can even read resistor values. So let's stop the myth we're all wondering what color grass and trees are, when a red team or red bird is in the area shall we?

I'm red-green colorblind, and I can tell the difference between those images. The colors in the second one look lighter and faded compared to the first one. Here is a page that has the Ishihara test patterns. Here is another page that has more detailed information. As a point of comparison, the two pictures of flowers about half way down the page (subtitled "red-insensitive dichromat") look very nearly identical to me.

Did you want colour blind test images, or people with colour blindness?

I probably have protanomaly. Distinguishing red and green isn't a problem at all, but I do see different shades of red and brown to other people (e.g. cheap Rubik's cubes with a darker shade of red than the original look maroon to me.) On one occasion, a normal sighted birdwatcher pointed out a Scarlet Robin in a tree that I couldn't see until I looked at it through binoculars, when the bird "popped out" with it's bright red breast. Without binoculars again, I couldn't pick up the red until I got closer and reached my red detection threshold.

On the test images linked about I see: 25, (20/29), (15/45), 56, spots, and (5). The numbers in brackets are where I can see something, but the number doesn't stand out clearly. The other test looks like a pale, but broken, 5 to me.

I've been wracking my brain trying to figure out a way to prevent emails from colorblind people! Those BASTARDS!

No, I'm afraid the most common color-blindness is red/green. First google link

but there are various types of color blindness. Different people have different impairments. these pictures are a common example. if a person is color blind to one of those sets of colors, the number in those circles will be not be visible to them. (disclaimer: IANAED. I am not an eye doctor)

Google reckons that "Congenital color vision deficiency overwhelmingly affects more men than women. About 10 million men in the United States (7% of the male population) have a color vision deficiency compared to 0.4% of women. Caucasian men experience the highest prevalence of this disorder." et al.

Try a colour vision deficiency test yourself.

C.f. the overheard conversation in Return to Castle Wolfenstein:

• German 1: "How do ve defuse this thing?"
• German 2: "Cut ze red wire. Or is the ze green? Hold on vhile I get ze manual."
• German 1: "Ach, it doesn't matter, ze all look grey to me anyvay." [BOOM]

It's funny, until you ask the Institute of Electrical Engineers (largely composed of caucasian men) whether they require their members to be able to distinguish wiring colours. Go on, ask them. ;-)

I believe you are talking aboutthis test.

Although I think it's highly questionable as to how accurate this could possibly be using uncalibrated computer monitors...