NATS 1870 Chapter Notes - Chapter 13: Aqueous Humour, Color Blindness, Choroid

• School: York University
• Department: Natural Science
• Course: NATS 1870
• Professor: Tatiana Ouvarova

Document Summary

Physiology of the human colour vision system i. Eyes are our main tool of perception of our surroundings, gathering up to 75% of our total sensory information. Dot", not a resolved star with surface details, etc ). The cornea (front of eye) does most of the refraction (before the lens). Optics of the eye: forming an image. Pupil: the black" aperture (opening) of the eye through which light enters the eye, similar to the aperture of a camera. Everything that we see is from light that enters the eye through the pupil only. Eye (side & front view) neural signal) Iris: a muscle diaphragm suspended over the lens of the eye. It also contains pigments that determine the colour of the eyes. The iris can shrink back on the lens (enlarging the pupil, or the opening (pupil dilation), or stretch forward over the lens (reducing the pupil, or the opening (pupil constriction).