Ophthalmology Questions With Correct Review A+

Ophthalmology Questions With Correct Review A+ Light passes through the cornea and travels through the ___ humour (anterior segment) to the pupil, which allows an amount of light to pass through to the ___, which focuses light onto the ____ region of the retina., from which nerve fibres take the image formed to the brain. - ANSWER-aqueous, lens, macular The orbital ___ = entry point for all nerves and vessels supplying the orbit - ANSWER-apex The orbit is formed by 7 different bones: Roof = ___ bone Lateral wall = _____ bone Floor = _____ bone Medical wall (thinnest) = ____ and ethmoid bone Back = greater wing of sphenoid and small contribution of palatine - ANSWER-frontal, zygomatic, maxillary, lacrimal The ____ of Zinn (aka common tendinous ring) is a ring of fibrous tissue surrounding the ___ nerve at its entrance at the orbital apex. It rests on the ____ ____ ____ (between wings of sphenoid) and serves as an attachment point for the 4 ____ muscles. - ANSWER-annulus, optic, superior orbital fissure, rectus Eyelid muscles: - Orbicularis ___ = ____ eyelid, supplied by CN __ - Levator palpebrae = ____ eyelid, supplied by CN __ - ____ muscle (superior tarsal muscle) = smooth muscle, helps elevate upper eyelid, sympathetic innervation - ANSWER-oculi, VII, closes, III, opens, Muller's Extraocular muscles: Superior/inferior/medial rectus, inferior oblique = CN __ Superior oblique = CN __ Lateral rectus = CN __ - ANSWER-III, IV, VI Intraocular muscles: - Sphincter pupillae and ciliary muscle = CN __ - Dilator pupillae = sympathetic supply via CN __ - ANSWER-III, V TRUE or FALSE: o