Morphologic changes in the anterior segment after phacovitrectomy for proliferative diabetic retinopathy

Area of Science:

• Ophthalmology
• Retinal Surgery
• Anterior Segment Analysis

Background:

• Proliferative diabetic retinopathy (PDR) often requires surgical intervention.
• Combined phacoemulsification with intraocular lens implantation and pars plana vitrectomy (phacovitrectomy) is a surgical approach for PDR.
• The impact of phacovitrectomy on anterior segment morphology and inflammation in PDR patients requires investigation.

Purpose of the Study:

• To assess morphologic changes in the anterior segment following phacovitrectomy in PDR patients.
• To evaluate the relationship between induced anatomic changes and subsequent inflammatory complications.
• To compare these outcomes with pars plana vitrectomy (PPV) alone.

Main Methods:

• A comparative study involving 60 PDR patients divided into phacovitrectomy and PPV-only groups.
• Ultrasound biomicroscopy (UBM) was used to measure ciliary region morphology pre- and post-surgery (up to 2 months).
• UBM parameters and inflammatory complication rates were compared between the two surgical groups.

Main Results:

• Phacovitrectomy led to a higher incidence of supraciliary effusions (80%) compared to PPV alone (46%).
• More pronounced decreases in angle opening and anterior chamber depth were observed after phacovitrectomy.
• Phacovitrectomy patients experienced higher rates of abnormal intraocular pressure (60% vs. 30%) and intraocular fibrin/posterior synechia formation (30% vs. 7%).

Conclusions:

• Phacovitrectomy in PDR patients may induce significant anterior segment morphologic alterations.
• Supraciliary effusions are associated with increased inflammatory complications post-phacovitrectomy.
• Effective management of postsurgical inflammation is crucial for patients undergoing phacovitrectomy for PDR.