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👁 Understanding Glaucoma Medications via Autonomic Receptors

The autonomic nervous system regulates intraocular pressure (IOP)
by influencing aqueous outflow and production through various receptors.


💊 Mechanism by Receptor Type

Receptor ActionMechanism of IOP ControlMnemonic
M3 agonist Contracts ciliary muscle → ↑Trabecular Outflow M↑ T↑
α1 agonist Dilates iris → ↑Trabecular Outflow A↑ T↑
α1 antagonist Constricts iris → ↑Uveoscleral Outflow A↓ U↑
β2 antagonist ↓Blood flow to ciliary body → ↓Aqueous Production B↓ P↓
α2 agonist ↓Aqueous production + ↑Uveoscleral outflow A2 U↑, P↓

✅ Summary

  • Most glaucoma drugs work by enhancing outflow or suppressing production
  • Understanding autonomic receptor mechanisms helps guide effective treatment
  • Next: Breakdown of individual medications by class

 

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