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A&P 1
Eye quiz
| Question | Answer |
|---|---|
| ora serrata | anterior edge of posterior chamber |
| ciliary body | anterior extension of choroid that encircles lens. includes ciliary muscle and ciliary process |
| ciliary muscle is attached to and controls shape of lens via the | suspensory ligaments |
| cornea | anterior extension of sclera, refract light and handles 3/4 focusing capacity of eye |
| iris | - regulates light entering posterior chamber of eye through pupil - plays role in formation of clear images by preventing light rays from entering eye via the periphery of lens - sphincter pupillae muscle and dilatory pupillae muscle |
| pupil | middle part of lens |
| anterior segment (chamber) | filled with aqueous humor from ciliary process |
| lens | - composed of crystallin, surrounded by CT - contributes to focusing light rays on retina - only refractive media that change change its effect on bending of light rays |
| scleral venous sinus (canal of Schlemm) | encircles cornea, absorbs aqueous humor from anterior chamber into blood |
| posterior segment (chamber) | filled with vitreous humor |
| optic disc | where optic nerve exits from back of eye |
| fovea centralis | where cones are found, pit in the macula lutea |
| macula lutea | holds fovea centralis (ABOVE IT ON DIAGRAM) |
| retina | - lines posterior chamber of eye (YELLOW ON DIAGRAM) - contains photoreceptors (rods and cones) for vision and bipolar + ganglion cells |
| choroid | middle vascular layer, provides nutrition to other layers, has melanin to prevent internal reflection |
| sclera | - white of eye, tough outermost layer - where extrinsic eye muscles have their insertion - fibrous CT provides support |
| superior oblique | - origin: optic foramen in sphenoid - trochlear nerve |
| inferior oblique | - origin: maxilla - oculomotor nerve |
| superior rectus | - origin: optic foramen in sphenoid - oculomotor nerve |
| medial rectus | - origin: optic foramen in sphenoid - oculomotor nerve |
| lateral rectus | - origin: optic foramen in sphenoid - abducens nerve |
| inferior rectus | - origin: optic foramen in sphenoid - oculomotor nerve |
| ciliary muscle is effector for the | accommodation reflex |
| glaucoma | blockage of scleral venous sinus. fluid buildup compresses and damages neurons at back of eye causing blindness |
| corneal opacity | cornea loses its clarity |
| presbyopia | stiffening of the lens, inability to see close |
| cataracts | clouding of the lens |
| phacoemulsification | extraction of lens followed by lens implant |
| blind spot of optic disc | where no rods/cones are present, "filling in" occurs |
Created by:
katiew0