Changes in angle configuration after phacoemulsification measured by anterior segment optical coherence tomography

Area of Science:

• Ophthalmology
• Medical Imaging
• Surgical Outcomes

Background:

• Cataract extraction is a common surgical procedure.
• Understanding changes in anterior segment anatomy post-surgery is crucial for patient outcomes.
• Anterior segment optical coherence tomography (AS-OCT) offers detailed imaging of ocular structures.

Purpose of the Study:

• To quantify changes in ocular angle width following phacoemulsification and intraocular lens (IOL) implantation.
• To utilize anterior segment optical coherence tomography (AS-OCT) for precise angle measurements.
• To assess the impact of cataract surgery on anterior chamber dimensions.

Main Methods:

• AS-OCT imaging was performed on 21 patients before and one month after cataract surgery.
• Measurements included central anterior chamber depth, angle opening distance (AOD500), and trabecular iris surface area (TISA750).
• Preoperative and postoperative data were statistically compared using paired samples t tests.

Main Results:

• Mean anterior chamber depth significantly increased from 2.92 mm to 4.24 mm post-surgery (P=0.044).
• Significant increases in both nasal and temporal angle parameters were observed.
• Nasal angle opening distance (AOD500) increased by 88.2% and nasal trabecular iris surface area (TISA750) by 94.4%.

Conclusions:

• AS-OCT imaging confirms a significant widening of ocular angles after cataract extraction.
• Phacoemulsification and IOL implantation lead to measurable improvements in anterior segment geometry.
• These findings highlight the beneficial effects of cataract surgery on angle configuration.