Final answer:
The medication Sylvia is taking for glaucoma is a carbonic anhydrase inhibitor, which acts as a diuretic to reduce intraocular pressure.
Step-by-step explanation:
Glaucoma is a condition that causes fluid accumulation in the lens of the eye, leading to enlargement. The medication that acts as a diuretic to reduce intraocular pressure in glaucoma is a carbonic anhydrase inhibitor. This medication inhibits the enzyme carbonic anhydrase, which competitively prevents water formation and promotes water release through the urine, thereby reducing the pressure inside the eye.