ANAT2111 Lecture Notes - Lecture 4: Optic Chiasm, Levator Palpebrae Superioris Muscle, Calcarine Sulcus

• School: UNSW, UNSW Sydney
• Department: Anatomy
• Course: ANAT2111
• Professor: Dr Lawrence Wade

Document Summary

Contains four walls (medial, lateral, roof and floor). As you blink, tears flow across the surface of the eye and is collected by small canals into the lacrimal sac. From here, they flow into the nasolacrimal duct into the nasal cavity. Hence why we have a runny nose when crying. The internal cavity is filled with humorous or fluids. Lens - suspended vertically and divides cavity into posterior +anterior segments. Posterior segment = posterior segment = vitreous humor: fibrous layer. Difference between connective tissue in sclera and cornea is arrangement. Sclera - white of the eye - tough. Extraocular muscles move the eyeball in different directions. Equivalent to the dura mater of the brain. Transparency is due to the regular arrangement of collagen fibres. Forms part of the reflective components of the eye (parts of eye allow lightwaves to bend): vascular layer. Accomodation adjust the shape of the lens to focus light on a certain area of the retina.