Anatomy of the Eye

hi in this video i'm going to discuss the anatomy of the eye so to illustrate this i'm going to draw the eye in cross section splitting it down here and our point of view will be from here so let me just draw it quickly the eye kinda looks like this and i'll start by labeling some of the major features the anterior chamber is this space at the front of the eye here and just behind it we have the posterior chamber these two chambers are filled with a fluid called the aqueous humor the anterior and posterior chambers are separated by the iris which is the coloured part of the eye the lens then sits in behind the iris and forms the posterior wall of the posterior chamber behind the lens lies a large space called the vitreous chamber which is filled with a gelatinous substance called the vitreous humor not to be confused with the aqueous humor in the anterior and posterior chambers holding the lens in place we have tiny ciliary muscles which attach to zonules small fibrous strands of connective tissue that attach to the lens by contracting and relaxing the ciliary muscles and zonules change the shape of the lens to help the eye focus at the back of the eye we have a small pit called the fovea which is an area with a high density of color photoreceptors called cones this is the part of the retina used for high acuity vision at the back of the eyeball we also have the optic disc this is the point where all the nerves from the photoreceptors dive back through the retina and then onward to the brain through the optic nerve the optic disc is responsible for the blind spot in our vision of course i should also label this whole section as the retina which is the part of the eye responsible for sensing light out here we have the sclera which is the white part of the eye and at the front we have the cornea which is the clear part of the eye at the back this is the optic nerve extending back toward the brain and on this view we can also see two of the six muscles responsible for eye movements they are the superior rectus muscle and the inferior rectus muscle and that's an overview of the general anatomy of the eye if you've enjoyed this tutorial please help us produce more by making a donation at www.handwrittentutorials.com

Channel: Handwritten Tutorials

Views: 340,581

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Keywords: handwritten, tutorials, anatomy, eye, eyeball, anterior chamber, posterior chamber, canal of schlemm, lens, zonules, ciliary muscles, cornea, sclera, retina, fovea, optic, disc, disk, blind spot, glaucoma, papilloedema, medicine, doctor, student, med school, pre-med, USLME, Step 1, USMLE help, USMLE lessons, USMLE tutorials, free USMLE, Animation, eye (human sense organ)

Id: MJxxFwVu1OM

Length: 3min 28sec (208 seconds)

Published: Mon Apr 07 2014