overview_of_eye - An Overview of Anatomy and Physiology of...

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An Overview of Anatomy and Physiology of the Eye
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A, Graves disease stare. B, Myathenia gravis. C, Congenital ptosis of right eye. D, Levator disinsertion. E, Horner syndrome or oculosympathetic denervation of left eye. F, Left seventh nerve palsy. (Photographs curtesy of Dr. Jeffery Nerad ) Changes in the eyelid fissure
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Eye Color
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Common myths for vision or eye A. 20/20 is perfect vision. B. Reading in the dark will hurt your eyes. C. Eating carrots will make your vision better. D. You have to wait for a cataract to be ripe before having it removed. E. It will hurt a child s eyes to sit too close to the television set.
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Landmarks of the external eye. The palpebral fissure is approximately 27-30 mm long and 8-11 mm wide in the adult. The caruncle and plica semilunaris and seen near the medial canthus. Pupil Iris Conjunctiva & Sclera Limbus
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A Side View Of The Eye
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Eyelids and the lacrimal secretory and excretory systems a. The lacrimal gland, the orbital lobe (Lo) and the palpebral lobe (Lp), is separated by the tear ducts (arrow). b. The accessory lacrimal exocrine glands ( blue ) contribute to the aqueous layer of the precorneal tear film. c. The conjunctiva (the Bulbar conjunctiva of the eyeball and the Palpebral conjunctiva of the eyelid) and tarsal mucin-secreting goblet cells ( green ) produce a musoprotein layer covering the epithelial surface of the cornea and conjunctiva. The lacrimal gland Tarsal (Meibomian) gland
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The lacrimal drainage system includes canliculi, the tear sac and the nasolacrimal duct.
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Facial sheath of the eyeball after removal of the eyeball Tenon s capsule is composed entirely of compactly arranged collagen fibers and a few fibroblasts. Anteriorly, it fuses with the conjunctiva slightly posterior to the corneoscleral junction (limbus). Posteriorly, it is perforated by the optic nerve sheath and by the posterior ciliary vessels and nerves and becomes more attenuated. The vortex veins pass through the capsule near the equator of the globe. Tenon s capsule and the intermuscular fibrous membranes surrounding the 4 rectus muscles fuse to form a type of fibrous sling or support.
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The pattern of orientation of the collagen bundles in the scleral stroma in relation to the extraocular muscle tendinous insertions
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The medial rectus tendon is closest to the limbus, and the superior rectus tendon is farthest from it. By connecting the insertions of the tendons beginning with the medial rectus, then the inferior
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