A client is receiving pilocarpine hydrochloride ophthalmic drops for glaucoma. The client calls the clinic nurse and reports difficulty seeing at night. Which explanation should the nurse provide?

Choice A reason: While pilocarpine ophthalmic drops can cause increased fluid in the eyes to help manage glaucoma, they do not typically cloud the visual field. The main purpose of pilocarpine is to reduce intraocular pressure by increasing the outflow of aqueous humor.Choice B reason: Pilocarpine is a cholinergic agent that stimulates the sphincter muscles of the iris, leading to miosis (constriction of the pupil). This reduces the pupil's ability to dilate in low-light conditions, making it more difficult for clients to see in the dark. This explanation accurately addresses the client's concern about night vision.Choice C reason: Pilocarpine does not cause the lens to become more opaque. Opaque lenses are more commonly associated with cataracts, which are not related to the use of pilocarpine.Choice D reason: Pilocarpine causes the pupils to constrict (miosis) rather than dilate. This constriction affects the pupil's ability to adapt to darkness but does not cause dilation that reduces night vision.