PSYA01H3 Lecture Notes - Lecture 4: Ganglion Cell, Retina, Critical Role
Document Summary
Take info from the external world and form some internal representation. Humans do not sense all there is to sense; bats have echo-locations, sharks" sense minute electrical current, rattlesnakes are sensitive to low frequency vibrations, dogs can smell cancer. Vision: is important for everybody, it is key to life. Iris: the colored part of the eye, it is actually a muscle that controls the size of the pupil. Pupil: the black part in the middle of the eye, the opening that allows light into the eyeball. Sdera: the white part of the eye, a tough membrane that serves as a protection. Cornea: the fluid filled outer coating of the eye, provides moisture and nutrients. Lens: focuses the incoming light onto the retina. This lens is flexible and slight alterations in it can alter the focus of it, a process called accommodation (an example would be to squint) Aqueous humor: this fluid nourishes the front of the eye.
