PHIL 2130 Chapter Notes - Chapter 5.1: Lacrimal Apparatus, Fovea Centralis, Ciliary Muscle
6 May 2020
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Somatic sensations (ie tactile, thermal, pain and proprioceptive) and visceral sensations. Vision or sight: white light has all the colours. There"s cranial nerve three that"s devoted to vision. Accessory structures of the eye: eyelids or palpebrae, eyelashes and eyebrows, extrinsic eye muscles (move the eyeball)-know. Lacrimal apparatus (tears): lacrimal glands excretory lacrimal ducts lacrimal canals (superior or inferior) nasolacrimal sac nasolacrimal ducts nasal cavity. These are the tear ducts: crandial nerve vii innervates this-know. There"s a fibrous tunic layer, which is the outer layer. Part of this layer, there"s the sclera or white of the eye, and the cornea-transparent coat. This is comprised of the choroid, the ciliary body which consists of ciliary processes and ciliary muscle, and the iris (middle) Retina: this is the inner layer, and it has the optic disc (blind spot) and fovea centralis (innermost layer) Responses of the pupil to light: the pupil constricts as the circular muscles of the iris contract (parasympathetic input).
