Ophthalmology In primary angle-closure glaucoma pilocarpine lowers the intraocular pressure by its direct action on the: A Sphincter pupillae muscle B Ciliary epithelium C Trabecular meshwork D All of the above 💡 Explanation In primary angle-closure glaucoma pilocarpine lowers the intraocular pressure by its direct action on the: ✓ Correct Answer: A. Sphincter pupillae muscle