Selective Laser Trabeculoplasty in Primary Angle-closure Glaucoma After Laser Peripheral Iridotomy: A Case-Control...

Area of Science:

• Ophthalmology
• Glaucoma Research
• Laser Therapy

Background:

• Primary angle closure glaucoma (PACG) and primary open-angle glaucoma (POAG) are leading causes of irreversible blindness.
• Selective laser trabeculoplasty (SLT) is a common treatment for lowering intraocular pressure (IOP) in glaucoma.
• The efficacy of SLT in PACG following YAG peripheral laser iridotomy (PI) has not been extensively compared to POAG.

Purpose of the Study:

• To compare the effectiveness and safety of selective laser trabeculoplasty (SLT) in patients with primary angle closure glaucoma (PACG) after YAG peripheral laser iridotomy (PI) versus primary open-angle glaucoma (POAG).

Main Methods:

• A case-control study compared SLT outcomes in 59 PACG eyes (post-PI with open angles) to 59 age, IOP, and glaucoma severity-matched POAG eyes.
• Data collected included changes in intraocular pressure (IOP) and medication usage post-SLT.
• SLT success was defined as a ≥20% IOP reduction or ≥1 medication decrease without further intervention.

Main Results:

• Both PACG and POAG groups showed significant IOP reduction and decreased medication use after SLT.
• Mean IOP decreased from 19.3 mmHg to 15 mmHg in PACG and 19.6 mmHg to 16.1 mmHg in POAG.
• Success rates were high and not significantly different (84.7% in PACG vs. 79.6% in POAG). IOP spikes were infrequent and manageable.

Conclusions:

• Selective laser trabeculoplasty (SLT) demonstrates equivalent safety and efficacy in treating primary angle closure glaucoma (PACG) following PI and primary open-angle glaucoma (POAG).
• SLT is a viable treatment option for both PACG and POAG, offering comparable IOP control and medication reduction.