Evaluation of Anterior Segment and Intraocular pressure Changes in Phakic Eyes After Pars Plana Vitrectomy with Silicone Oil Injection Using Ultrasound Biomicroscopy

Ibrahim AL Ashry, Mostafa Ahmed; Awad, Mohamed Bahgat; Ibrahim, Mohamed Abdelkader; Ramadan, Ahmed Ragab

doi:10.21608/zumj.2023.232813.2868

Evaluation of Anterior Segment and Intraocular pressure Changes in Phakic Eyes After Pars Plana Vitrectomy with Silicone Oil Injection Using Ultrasound Biomicroscopy

Document Type : Original Article

Authors

Ophthalmology Department, Faculty of Medicine, Zagazig university

10.21608/zumj.2023.232813.2868

Abstract

Background: Parameters of the anterior segment may be impacted by pars plana vitrectomy (PPV). Ultrasound biomicroscopy (UBM) and anterior segment optical coherence tomography (AS-OCT) are the two most widely used methods for imaging the anterior segment.

Objectives: to evaluate anterior segment changes in patients undergoing pars plana vitrectomy with silicone oil injection and correlate these changes with post-operative IOP values.

Subjects and methods: This prospective, cohort study involved 25 eyes of 25 patients with PPV with silicone oil injection. They are chosen from the Ophthalmology Department, Faculty of Medicine, Zagazig University Hospital during the period from August 2021 to May 2023. This study measured the IOP and detected anterior chamber changes by UBM in phakic cases that underwent PPV with silicone oil injection.

Results: The iris-ciliary process distance was significantly decreased one week post-operatively (p =0.003), then significantly decreased at 1 & 3 months (p =0.002, 0.001, respectively). The length thickness was significantly increased 1 week and 1 month post-operatively (p =0.001, 0.049, respectively), then decreased at the third month near the baseline (p = 0.165). The angle opening distance was not significantly increased one week, one month and 3 months postoperatively (p >0.05).

Conclusion: The anterior segment's characteristics change as a result of PPV using silicone oil as an internal tamponade agent. The alterations in these parameters appear to be a significant contributor to postoperative problems, particularly elevated intraocular pressure. To avoid such issues, it may be crucial to have a better grasp of how certain characteristics vary.

Keywords