Can we discuss colorblindness?

[purplehearingaid]

I looked up a colorblind test and one of image was of a penis ! LOL ! I guess I am not colorblind ! This ran in my mom’s family she had brother that was color and a female cousin from mom side is colorblind too . I got the colors green and orange mixed up as a kid but I out grew it which is weird .

[thelurkinghorror]

@raventhief

I saw this article today and found it interesting.

These GIFs Show You What It's Like To Be Color Blind | IFLScience

They’re reproducing color and they chose GIF as their format!? :smack:

@Broomstick

Two issues:

First of all, probably one of the better examples of the “color-weak” phenomena, but it still seems exaggerated to me. While I can’t really evaluate the green-weak pictures, I can see the red-weak as a color normal person could. Still seems exaggerated. I mean, I see green, I don’t think it’s as washed out as they imply. As I said, though, it’s not something I can judge objectively.

My objection to the achromatopsia picture is that no-cone vision also has markedly lowered acuity. It’s not a high-resolution as cone vision, at least not in humans. The lack of acuity is actually more disabling (or so I’m told) than the lack of color vision.

1. I agree, and with anomalous trichromacy you have other mechanisms that can compensate for it, so the actual thing seen by these people isn’t a big deficit. The protanomaly one is particularly off.

2. I presume that they mean cerebral achromatopsia that involves brain damage but he cones are fine. I think it’s sometimes associated with poor acuity but I’m not sure if the condition causes poor acuity or if they’re comorbid.

“Blue cone monochromacy” is achromatopsia! You can’t see color with one cone type. They would see in B&W and have poor acuity (legally blind, at least), just as Broomstick notes.

[Broomstick]

It’s my understanding that blue-cone monochromacy does diminish acuity somewhat, but not to the degree no-cone rod-only vision does.

Oliver Sachs discusses the case of an artist whose vision when monochromatic after an injury who apparently did not suffer from acuity problems, but did discuss somewhat at length the problems of rod-only achromats in Isle of the Colorblind.

[thelurkinghorror]

Yes, I’ve met two S cone monochromats and had coke bottle glasses and magnifiers and were still blind as bats, although one was better at hiding it.

Rod-only people also have poor vision, with the added disadvantage that even relatively dim levels of light wash everything out.