A client with open-angle glaucoma is using pilocarpine opthalmic solution, a miotic agent. Which action should the nurse at the eye clinic include in evaluating the effectiveness of the medication?

A. Palpate eyelids for decreased swelling: Pilocarpine is used to lower intraocular pressure in glaucoma by promoting aqueous humor drainage; it does not primarily target eyelid swelling. Palpating the eyelids would not provide relevant information about the drug’s effectiveness. B. Check amount of drainage from each eye: Drainage from the eyes may suggest infection or irritation but is not a measure of how well pilocarpine is controlling intraocular pressure. Monitoring drainage does not directly assess the therapeutic effect of a miotic agent. C. Review eye pressure measurements: The primary goal of pilocarpine therapy in open-angle glaucoma is to lower intraocular pressure (IOP) to prevent optic nerve damage and preserve vision. Evaluating IOP measurements directly assesses the effectiveness of the medication in achieving its intended outcome. D. Use Snellen chart to assess visual acuity: While maintaining vision is a long-term goal in glaucoma management, changes in visual acuity do not immediately reflect the effectiveness of pilocarpine. Vision loss occurs over time if IOP is not controlled, making pressure monitoring a more immediate and sensitive indicator.