ANPS 019 Lecture Notes - Lecture 27: Frontal Eye Fields, Lacrimal Gland, Diplopia
14 Nov 2018
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Document Summary
Frontal eye fields and eye muscles ensure that images are focused on the retina. Misalignment of the eyes not lazy eye . In children, will lead to loss of depth & motion perception. In adults, will lead to diplopia = double vision. Conjunctiva: membrane that covers the inner surface of eyelids and the sclera. Conjunctivitis: pink eye infection resulting in blood vessel inflammation. Sclera: white of the eye, helps give eye shape. Cornea: provides most focusing of eye, avascular, most common organ transplant. Astigmatism: misshaped cornea, results in blurry vision. Iris + ciliary body + choroid middle layer. Pupilary dilator muscles: enlarge pupil, sympathetic innervation. Iris: colored part, muscles that regulate pupil size. Pupillary constrictor muscles: decrease diameter of pupil, parasympathetic (cn. Ciliary body: muscle controls tension on lens (to focus image) Retina: where optic nerve attaches, lacks photoreceptors (blind spot) Can see far away globe too short lens not round enough. People with dark iris more at risk.
