Topically used non selective alpha-agonist in glaucoma is?
**Core Concept**
Topical non-selective alpha-agonists are used in the management of glaucoma to reduce intraocular pressure (IOP) by increasing uveoscleral outflow and decreasing aqueous humor production.
**Why the Correct Answer is Right**
Epinephrine, a non-selective alpha-agonist, stimulates both alpha-1 and alpha-2 adrenergic receptors in the eye. This leads to the constriction of the iris dilator muscle, reducing the drainage angle and consequently decreasing IOP. Additionally, epinephrine increases uveoscleral outflow, further contributing to its IOP-lowering effect.
**Why Each Wrong Option is Incorrect**
**Option A:** **Apraclonidine** is a selective alpha-2 adrenergic agonist, not a non-selective alpha-agonist.
**Option B:** **Timolol** is a beta-blocker, not an alpha-agonist.
**Option C:** **Latansopride** is not a commonly used topical agent in glaucoma management.
**Clinical Pearl / High-Yield Fact**
Non-selective alpha-agonists like epinephrine are often used in combination with other IOP-lowering agents to achieve better control of glaucoma.
**Correct Answer: D. Epinephrine.**