Factors predicting intraocular pressure control after phacoemulsification in angle-closure glaucoma.

Area of Science:

• Ophthalmology
• Glaucoma Research
• Surgical Outcomes

Background:

• Primary angle-closure glaucoma (PACG) poses a risk to vision due to elevated intraocular pressure (IOP).
• Phacoemulsification is a common surgical intervention for cataracts, often performed in eyes with narrow angles or PACG.
• The impact of glaucomatous optic neuropathy on IOP reduction after phacoemulsification in these specific eyes requires investigation.

Purpose of the Study:

• To determine if glaucomatous optic neuropathy influences IOP reduction after phacoemulsification in post-iridotomy primary narrow-angle eyes.
• To identify preoperative factors predicting postoperative IOP control in patients with PACG.

Main Methods:

• Prospective enrollment of patients with PACG and a comparison group with primary angle closure or angle closure suspect (PAC/S) undergoing phacoemulsification.
• Measurement of diurnal intraocular pressure (IOP) one day before and three months after surgery.
• Statistical analysis, including multiple regression, to identify factors associated with postoperative IOP.

Main Results:

• Significant IOP reduction was observed post-surgery in both the PACG and PAC/S groups, with no significant difference between them.
• The number of glaucoma medications required decreased significantly in both patient groups.
• In the PACG group, higher preoperative mean IOP and deeper preoperative anterior chamber depth were positively correlated with higher postoperative IOP.

Conclusions:

• Phacoemulsification leads to significant and comparable IOP reduction in post-iridotomy eyes with primary narrow angles, irrespective of the presence of glaucomatous optic neuropathy.
• Preoperative IOP and anterior chamber depth are key factors influencing postoperative IOP levels in PACG patients.