Which laser procedure is used to treat glaucoma by increasing aqueous outflow through the trabecular meshwork?

Which laser procedure is used to treat glaucoma by increasing aqueous outflow through the trabecular meshwork?

• A. Laser iridotomy
• B. Laser trabeculoplasty
• C. Cyclophotocoagulation
• D. Retinal photocoagulation

Answer: (B)

Laser trabeculoplasty treats glaucoma by increasing aqueous humor outflow through the trabecular meshwork. In many cases of open-angle glaucoma, resistance to drainage sits at the trabecular meshwork. The laser modifies this tissue to improve drainage—either by creating microperforations or by stimulating remodeling—so aqueous humor can flow more readily into Schlemm’s canal, lowering intraocular pressure. By comparison, laser iridotomy creates a hole in the iris to bypass pupillary block (used for angle-closure scenarios), not to boost outflow through the meshwork. Cyclophotocoagulation reduces aqueous production by targeting the ciliary body, lowering pressure without increasing drainage. Retinal photocoagulation is aimed at retinal conditions and does not affect aqueous outflow.

Laser trabeculoplasty treats glaucoma by increasing aqueous humor outflow through the trabecular meshwork. In many cases of open-angle glaucoma, resistance to drainage sits at the trabecular meshwork. The laser modifies this tissue to improve drainage—either by creating microperforations or by stimulating remodeling—so aqueous humor can flow more readily into Schlemm’s canal, lowering intraocular pressure.

By comparison, laser iridotomy creates a hole in the iris to bypass pupillary block (used for angle-closure scenarios), not to boost outflow through the meshwork. Cyclophotocoagulation reduces aqueous production by targeting the ciliary body, lowering pressure without increasing drainage. Retinal photocoagulation is aimed at retinal conditions and does not affect aqueous outflow.