Frogs and toads have super nightvision

They’re able to see color in dark conditions, even when it’s so dark that human aren’t able to see anything at all. Most vertebrates, including humans, have two types of visual cells in the retina, called rods and cones.

Vino Optics Oxy-Iso color blind glasses review

… glasses that were originally designed to help doctors, paramedics, nurses, etc. with red-green color blindness to see health signs like veins. The lenses in the glasses amplify the perception of oxygenation of blood under the skin, allowing color …

Here’s what it’s actually like to be colorblind

I don’t see much of anything – just a bunch of reddish-brownish-greenish circles. Other colorblind people, apparently, might spot the digits 21. Sighted people should see a 74. Assuming you aren’t colorblind as well, you can see what I can’t because the cone cells in your eyes work better than mine.