[dexwiz]

Water absorbs photons at most frequencies outside the visible spectrum. What we deems as visible light is actually where water is most transparent. Since eyes evolved underwater, it makes sense they would use this section of the spectrum.

https://commons.wikimedia.org/wiki/File:Absorption_spectrum_...

[jvanderbot]

That makes so much sense and actually unravels a few other mysteries for me. Thanks!