Review Question - QID 213503

A 60-year-old man presents to the emergency room with sudden onset of severe pain in his left eye, complaints of blurriness and seeing halos around lights. He has a headache and is also experiencing significant nausea. He notes that his symptoms began shortly after sitting down in the movie theater. On physical examination, his eye is red and his pupil is fixed and dilated (Figure A). An ophthalmology consult is called, and the patient is given a medication to rapidly decrease the intraocular pressure in his left eye. Which of the following ophthalmologic medications functions to increase aqueous humor outflow via ciliary muscle contraction?