My friend made the claim that there exists a protein in your eye responsible for vision. This protein is sensitive to different wavelengths of light, and when it gets hit by the right wavelength, it kinks. In order to be un-kinked, he claimed, it has to be shipped down to the liver, and then back up to the eye.
He teaches organic chemistry at UCLA, so I trust him a little bit. But I couldn't find this with a quick search. Anyone know if this is legit?