Preoperative factors associated with IOP reduction after cataract surgery

Area of Science:

• Ophthalmology
• Glaucoma Research
• Surgical Outcomes

Background:

• Phacoemulsification cataract extraction is a common procedure.
• Primary open-angle glaucoma (POAG) requires careful management of intraocular pressure (IOP).
• Understanding factors influencing postoperative IOP is crucial for glaucoma patients undergoing cataract surgery.

Purpose of the Study:

• To identify preoperative factors predicting intraocular pressure (IOP) reduction after cataract surgery in patients with primary open-angle glaucoma (POAG).

Main Methods:

• Retrospective review of 103 eyes from 75 POAG patients undergoing uncomplicated phacoemulsification.
• Collected preoperative data: IOP, glaucoma medications, refractive error, corneal thickness, anterior chamber depth, axial length.
• Analyzed IOP changes 3-6 months post-surgery to identify significant predictive factors.

Main Results:

• Mean postoperative IOP reduction was 1.8 ± 3.5 mm Hg; 74% of eyes experienced decreased IOP.
• Preoperative IOP was the sole factor significantly associated with postoperative IOP reduction (p < 0.001).
• Higher preoperative IOP correlated with greater IOP reduction, while lower preoperative IOP showed minimal reduction or slight increase.

Conclusions:

• Preoperative IOP is the key predictor of postoperative IOP reduction following cataract surgery in POAG patients.
• Higher baseline IOP predicts a more significant IOP decrease post-surgery.
• These findings inform surgical decisions, particularly regarding combined procedures for POAG management.