BIOL 1103 Study Guide - Final Guide: Potential Flow, Optic Chiasm, Thalamus
Document Summary
The process of vision from seeing an object/person from a distance begins when light enters the eyes. Light waves first enter the eye through the cornea, an avascular (unable to produce antibodies/blood vessels) and transparent surface, which functions as the main refractive structure of the eye. Because of its transparent nature, light bends (or refracts) as it passes through and hopefully hits the focal point on the retina the area in which allows us to perceive images. Behind the cornea is the aqueous humour a transparent fluid that is contained in the anterior segment/cavity that functions to nourish and maintain the ocular pressure of the eye. Light then enters the pupil, a hole surrounded by the iris; both regulate the amount of light entering the eye. The iris contains pigment that distinguishes eye colour as well as papillary muscles (smooth muscles) that increase or decrease the size of the pupil.
