A 24-year-old woman with no significant past medical history presents to an ophthalmology clinic for a routine retinal examination. Prior to fundoscopic evaluation, she receives eyedrops that produce mydriasis without cycloplegia. Approximately 20 minutes after administration, her blood pressure is measured at 148/92 mmHg with a heart rate of 88 bpm; prior office visits documented a baseline blood pressure of 118/74 mmHg. She reports mild palpitations but denies headache, blurred near vision, or difficulty reading, indicating preserved accommodation. Slit-lamp examination reveals widely dilated pupils with intact lens focusing. Intraocular pressure is measured at 14 mmHg bilaterally by applanation tonometry. She denies prior use of beta-blockers, antihypertensives, or sympathomimetic medications. Which of the following drugs was most likely instilled?
- A)PhenylephrineGABARITO
- B)Acetazolamide
- C)Pilocarpine
- D)Atropine
- E)Timolol
Explicação
Phenylephrine is an alpha 1 agonist that contracts the radial dilator muscle of the iris, causing mydriasis without affecting the ciliary muscle. Therefore accommodation is preserved, unlike with muscarinic antagonists that cause cycloplegia. Ver explicação completa e trilha adaptativa →