EYES 507

what is the function of lacrimal sacs?

pumps tears

what is the function of the nasolacrimal duct?

supports nasal mucosa moisture

what are the parallel axes for EOM responsible for?

necessary for binocular, single-image vision

what is eye movement stimulated by?

cranial nerves → abducens (CN VI) moves lateral rectus muscle, trochlear (CN IV) moves superior oblique muscle, and oculomotor (CN III) innervates remaining

what is the basic structure of the eye?

internal eye made of 3 concentric layers, outer layer is made of the sclera and cornea, middle layer made of choroid, ciliary body, iris, pupil, and lens, and inner eye contains the retina and optic nerve

what is the pupillary light reflex?

mediated by optic nerve to protect photoreceptors

what is accommodation?

functional reflex changes lens curvature

what is myopia?

impaired far vision

what is corneal light reflex?

checking for parallel alignment of the eyes where light should be reflected in the same spot in each eye

what does the cover test check for?

alignment in movement → want eye to stay in place and not shift

what is a phoria?

mild weakness related to fusion reflex

what is strabismus?

constant misalignment of the eyes

what is a tropia?

specific types of misalignment