Fig 1.
Illustration of 2D and 3D angle and iris parameters at 750 µm from SS.
Schematic 2D parameters of (A) AOD, (B) ARA, (C) TISA, (D) IT are shown in the left panel. The 3D average parameters (-avg) are the average of 360-degree 2D measurements. The corresponding 3D estimate parameters (-est) on the 3D display of AS-OCT images are shown in the right panel, including (A) AOD750-est or angle opening circumferential area, (B) ARA750-est or AR circumferential volume, (C) TISA750-est or trabecular iris circumferential volume, and (D) IT750-est or iris thickness circumferential area; SS, scleral spur (red circle); AR angle recess (blue diamond); AS-OCT, anterior segment–optical coherence tomography; 2D, two-dimensional; 3D, three-dimensional; AOD, angle opening distance; ARA, angle recess area; TISA, trabecular iris space area; IT, iris thickness.
Fig 2.
Diagram summarizing all potential predictors categorized into clinical data, axial measurement and anterior segment morphometrics.
AS-OCT = anterior segment optical coherence tomography; AOD = angle opening distance; ARA = angle recess area; TISA = trabecular iris space area; -avg = average of 360-degree angle values; -est = estimation of circumferential area (for IT and AOD) or circumferential volume (for ACarea, Iarea, ARA, and TISA); -hoz = horizontal meridian (average of nasal and temporal sides); * binary factors – the value in parentheses indicates the represented category; † equivalent to anterior chamber volume; ‡ equivalent to iris volume.
Table 1.
Baseline clinical data, ocular biometry, and anterior segment dimensions from AS-OCT.
Table 2.
Univariable analysis of selected predictors for 1-month intraocular pressure change after phacoemulsification.
Table 3.
Final model formulas for predicting 1-month intraocular pressure change after phacoemulsification.
Table 4.
Comparison of model performance.
Fig 3.
Calibration plots showing predicted versus observed 1-month postoperative IOP.
The upper row represents 3D models and the bottom row 2D models. The blue lines show smoothed calibration curves, and the light blue shaded bands represent the 95% confidence intervals. The 45-degree dashed lines indicate perfect calibration.