Contacts & the Zombie Apocalypse

It’s a question we field at least once per week: What’s one to do if the Zombie Apocalypse happens, and you can’t get any more Contacts? This article from Mental Floss gives some good ideas and thoughts on the subject: CL’s & the Zombie Apocalypse Fortunately, we are not (yet) in this predicament.  If it’s … [Read more…]

Snakes and our Vision

We may have developed the ability to resolve fine detail (known as “clarity”) as well as our color vision in order to defend ourselves from snakes. Retinal receptors were refined to differentiate a snake’s presence from a simple stick on the ground or a branch in a tree. See the article here: http://www.npr.org/blogs/13.7/2015/03/19/394099609/we-may-have-snakes-to-thank-for-our-acute-vision Careful out … [Read more…]

The world through a Tetrachromatic’s Eyes

Normal human color vision is called “Trichromatic,” which is provided by retinal cells that can sense a range of wavelengths centered around three main colors: blue, red, and green. “Tetrachromatic” color vision is uniquely provided by an incredibly rare genotype, which allows a fourth color receptor in the eyes. Most humans have vision than can … [Read more…]