The eye’s ideal state The biology of our vision itself has evolved to facilitate this superpower. Human vision is particularly sensitive to green wavelengths, which fall in the middle of our visual spectrum, within the 495–570 nanometre range (a nanometre is one thousand-millionth of a metre). This makes these tones easier to process and allows us to see them most easily, in their myriad variations. So, even now that we aren’t primarily inhabiting a forest, jungle, or savanna, the eye is geared towards green.
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