Visual perception is dependent on... - the eye, its accessory structures, optic tracts, and the 1 degree visual cortex and its association areas, Vision is possible because of...  - photoreceptors, Palpebra is what structure - eyelids, Conjunctiva definition - clear mucous membrane that covers the avascular part of the eye, Where do tears drain to? - the lacrimal puncta , What is the flow of tears? - lacrimal gland - lacrimal ducts - superior or inferior lacrimal canal - lacrimal sac - nasolacrimal duct - nasal cavity, What are the 3 layers that make up the eye? - Fibrous tunic, vascular tunic, nervous tunic, Fibrous tunic definition - the outermost layer of the eye containing the cornea and sclera, Vascular tunic definition - the middle layer of the eye containing the choroid, ciliary body and the iris, Nervous tunic definition - the innermost layer of the eye, the retina and the optic disc, Optic disc definition - where the nerve and retinal vessels enter and exit the eyeball. Its existence creates a necessary defect on the retina - an area where there are no cones or rods creating a "blind spot", Rods definition - photoreceptors that are adapted for low light and produce low resolution black and white images, Cones definition - Photoreceptors that are adapted for bright light, there are 3 kinds all different colors to allow for us to see colored images, Pupillary response definition - contraction of the inner circular muscle fibers cause the pupil to constrict while contraction of the radial fibers cause it to dilate, Aqueous humor definition - a nourishing fluid that flows through the anterior cavity of the eye to deliver O2 and to help maintain intraocular pressure, Myopia definition - Nearsightedness, only close objects can be seen clearly, Hyperopia definition - Farsightedness, only distant objects can be seen clearly , Where are tears produced? - lacrimal glands,

Vision

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