It's also worth mentioning Ibn al Haytham, who wrote the seven-volume Book of Optics in 1011 - 1021, and covered topics including how the eye handles reflected light. Also observed the effect of image inversion when developing the camera obscura.

There are many other scientists over the ages (whom we know a LOT about) that contributed to our understanding of eyes and optics. I don't think there are enough words in that article to really teach anything meaningful. The history is genuinely interesting, why write so little (even if it's just SEO)?

I want to know how they understand how cats and dogs see. They say certain colors, but how do they know for sure?