Question

16. Which is true? a. An eye drop that constricts the pupils belongs in a medication category that mimics

Answer 1

16. Which is true? An eye drop that constricts the pupils belongs in a medication category that mimics the effect of the sympathetic nervous system (sympathomimetic). b. An eye drop that causes miosis belongs in a sympathomimetic medication category. C. If an eye drop causes mydriasis, it has probably blocked the adrenergic effect of a cranial nerve. If an eye drop causes mydriasis, it has probably blocked the cholinergic effect of a cranial nerve. Sympathomimetics and parasympatholytics cause pupil dilation (mydriasis). Pupil constriction is called, "miosis." Cholinergic effect of cranial nerves causes miosis. So, if an eye drop causes mydriasis, it has probably blocked the cholinergic effect of a cranial nerve. A patient complains of sudden intolerable pain in the right eye. Glaucoma is considered as a diagnosis. Which statement is true? a. Open-angle glaucoma is likely, since it often causes a sudden painful increase in intraocular pressure. Closed-angle glaucoma is likely, since this disorder allows too much aqueous humor to be reabsorbed all at once, causing pain. Decrease in peripheral vision should be tested for, since this is a typical assessment finding in glaucoma. Decrease in central vision should be tested for, as this is a cardinal sign of glaucoma. Sudden painful raise in intraocular pressure occurs in closed-angle glaucoma. Glaucoma results from lack of ability to reabsorb the aqueous humor, so it accumulates. Decreased central vision occurs in age related macular degeneration (AMD). As the patient is reporting pain in the right eye, he must be tested for reduced peripheral vision, which is commonly found in glaucoma.