Temporal corneal phacoemulsification in patients with filtered glaucoma

Area of Science:

• Ophthalmology
• Glaucoma Surgery
• Cataract Surgery

Background:

• Trabeculectomy is a common glaucoma surgery to lower intraocular pressure (IOP).
• Cataract development is common in patients with glaucoma, often requiring phacoemulsification.
• The effect of subsequent cataract surgery on pre-existing filtering blebs is a clinical concern.

Purpose of the Study:

• To assess the impact of temporal clear corneal phacoemulsification on IOP in eyes previously treated with trabeculectomy.
• To compare long-term IOP control after combined trabeculectomy and phacoemulsification versus trabeculectomy alone.

Main Methods:

• Retrospective case-control study involving 40 patients undergoing trabeculectomy followed by phacoemulsification and 40 controls who had trabeculectomy alone.
• Patients were matched for follow-up duration, age, IOP, medication use, and other clinical factors.
• Intraocular pressure was compared pre- and post-phacoemulsification, and survival analysis was used to evaluate IOP control over time.

Main Results:

• Phacoemulsification did not significantly alter IOP one year after surgery in the trabeculectomy-phacoemulsification group compared to pre-operative levels.
• Long-term IOP control rates at 3, 6, and 9 years post-trabeculectomy were similar between the trabeculectomy-phacoemulsification group and the trabeculectomy-only group.
• Kaplan-Meier survival analysis revealed no statistically significant difference in IOP control rates between the two groups.

Conclusions:

• Temporal clear corneal phacoemulsification is safe for eyes with filtering blebs from prior trabeculectomy.
• Cataract surgery using this technique does not compromise long-term intraocular pressure management in glaucoma patients.
• This finding supports the combined approach for patients needing both procedures.