Most animals don't "see" the same wavelengths that humans see.  And many animals, if not all, have other senses superior to those of humans.  It's the total package that counts.

As an example, take the average house cat.  Sees very well in low light.  Hearing is extremely acute, and hears frequencies humans cannot sense.  Sense of smell is better than that of a human.

Compared to most animals, we humans are relatively blind, deaf, and can't smell.

Just google "How do feral pigs (or whatever animal) see?  More importantly also google how they hear, smell, and so forth.

From decades of experience.

Hogs have a reputation of not being able to see well, but well is relative. My experience is that they see about as well as we humans do.

The one exemption to that was I was hunting WAY back in the day with a Gen One Night Owl or some such. It was pitch black. I literally couldn't see my hand in front of my face and I typically see well in the dark compared to most others. It was just a completely overcast night with thick cloud cover and no light. I had a pig come in and "he" wasn't bouncing off of trees. So he could "see" better than me. Because I could not have navigated my way to that spot without a light.

Those "Red Blind" pigs could also see the little dim red light from that Night Owl. Of course bow hunting from right from on top of them is a lot different than gun hunting them.

I was trying to use a 10 ft tripod and was 15 yards away.
------------------------------------------

Really WAY back in the day, like when it was first legalized to hunt pigs at night, you could flop a red spot light on them from 50 yards away and there was no noticeable change in their behavior and start blasting. It didn't take long before that didn't work anymore. Less than about 2 years, that tactic was done anywhere I hunted from East to West Texas. If you turned on a red spotlight, you were shooting at running pigs.
------------------------

I have used the method of a fixed feeder and a red light that comes on a dark and goes off at dawn for over a now. There is a definite shadow line on the ground because I have my lights about 20 feet up shining at a feeder that is 20 yards away. You can see the whole clearing because of the illumination and my feeder cast corn far past the cone of light.

Most pigs will come right in and feed under the feeder. However there have been enough of them that stop at that line to notice a trend that a few will never step into that light. Even though I can see them as well as the rest, they will not step into the "light". The follow the shadow all the way around and will not step across the line they supposedly can't see. They just eat the corn that is outside the light. Usually it is big boars, but sometimes it is the sow that is with babies. At the same time some sows and boars will ignore it and come right in. There is no way to know the when and the what other than it is individuals.

I don't shoot as soon as pigs come in. I watch them. I get to observe them for long periods of time from an up close position. I learned a thing or two bow hunting in Africa, I have a box blind with sealed doors and windows and keep them closed to keep my scent inside, so I'm able to observe stuff that I was never able to see before because eventually you will get busted if you are that close if you give them long enough to get around the tree you climbed or if one of them catches a molecule of your scent from a swirl of wind or if one slips around down wind and spooks the rest of them.

So they can see something even though supposedly they can't.

I would say noise and scent is more important to most animals, I've had animals look at me, and as long as I froze, didnt make eye contact and had the wind in my face 90% of the time I can continue the stalk.

Matter of Fact Myself and a Ranger Buddy who works for Daniel Defense and myself snuck up on a small sounder of 5 pigs last week and shot them at a whopping 7 yards in the face. they never had a clue until the very last second as we were not silhouetted by the moon, the wind was non existent, and through Unfilmed WP and Green Phosphor Sentinels and PVS-31's they never had a chance.