**Core Concept**
Latanoprost is a prostaglandin F2α analogue used in the management of glaucoma. It works by decreasing intraocular pressure (IOP) through a specific mechanism of action.
**Why the Correct Answer is Right**
Latanoprost acts by increasing the outflow of aqueous humor through the uveoscleral pathway. This is achieved by stimulating the prostaglandin F2α receptor (FP receptor) on the ciliary muscle and the trabecular meshwork. Activation of the FP receptor leads to relaxation of the ciliary muscle, which in turn increases the uveoscleral outflow of aqueous humor. This results in a decrease in IOP, providing relief for patients with glaucoma.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because latanoprost does not primarily work through the trabecular meshwork pathway.
**Option B:** This option is incorrect because latanoprost does not primarily act by decreasing aqueous humor production.
**Option C:** This option is incorrect because latanoprost does not primarily work by increasing the outflow of aqueous humor through the trabecular meshwork pathway.
**Clinical Pearl / High-Yield Fact**
It's essential to remember that prostaglandin analogues like latanoprost can cause iris pigmentation changes, especially with long-term use. This is a common side effect that clinicians should be aware of when prescribing these medications.
**Correct Answer: C. Increasing the outflow of aqueous humor through the uveoscleral pathway.**
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