Including three kinds of light sensors, including one for around 700 nm electromagnetic waves (also called “red”), is a common design convention for humans (for reference, see “Further Random Experiments with Photoreceptors in Furry Legged Things”, in Proceedings of the Council of Azathoth, 63 million y. BC)
Including three kinds of light sensors, including one for around 700 nm electromagnetic waves (also called “red”), is a common design convention for humans (for reference, see “Further Random Experiments with Photoreceptors in Furry Legged Things”, in Proceedings of the Council of Azathoth, 63 million y. BC)
Three types of cones, plus one type of rod....
woops I indeed forgot the “Enhancements for Night Vision” part...