Evaluation of Anterior Segment Parameter Changes Using the Sirius after Uneventful Phacoemulsification

Area of Science:

• Ophthalmology
• Biomedical Engineering
• Anterior Segment Imaging

Background:

• Cataract surgery is a common procedure with potential impacts on anterior segment parameters.
• Accurate measurement of anterior segment dimensions is crucial for understanding surgical outcomes and patient-specific responses.

Purpose of the Study:

• To evaluate changes in anterior chamber depth (ACD), corneal volume (CV), anterior chamber angle (ACA), anterior chamber volume (ACV), central corneal thickness (CCT), horizontal visible iris diameter (HVID), pupil diameter (PD), and intraocular pressure (IOP) following phacoemulsification with intraocular lens implantation.
• To assess the utility of preoperative Sirius 3D Rotating Scheimpflug camera topography for predicting these postoperative changes.

Main Methods:

• Prospective study of 132 eyes undergoing uneventful phacoemulsification cataract surgery.
• Preoperative and 1-month postoperative measurements using the Sirius 3D Rotating Scheimpflug camera and Goldmann applanation tonometer.
• Analysis included ACD, CV, ACA, ACV, CCT, HVID, PD, and IOP, with IOP corrected for CCT.

Main Results:

• Statistically significant increases observed in postoperative ACD, ACV, ACA, CV, and HVID compared to preoperative values (p < 0.05).
• CCT remained stable post-surgery.
• Significant decreases in postoperative PD and IOP were noted compared to preoperative measurements (p < 0.05).

Conclusions:

• Phacoemulsification with IOL implantation leads to significant alterations in multiple anterior segment parameters.
• Preoperative Sirius topography measurements show promise in predicting these postoperative changes.
• The Sirius system offers a reliable, noninvasive method for anterior segment assessment.