3D Reconstruction of FCB Successfully Published in Clinical Ophthalmology

Three-Dimensional Reconstruction for Localizing Retinal Tears in Treatment of Rhegmatogenous Retinal Detachment by Foldable Capsular Buckle

Assuming a circle passing through the tear, macula, and anterior corneal vertex, computer-aided design (CAD) software calculated half circumferences for varying axial lengths. The distance from the tear’s anterior edge to the posterior corneoscleral limbus was derived as the half circumference minus the corneal radius, further subtracting the arc length from the tear to the macula.

The chord length from the tear to the macula was converted from the arc length, and breaks were localized by scaling chord lengths using the optic disc’s horizontal diameter.

For axial lengths of 23.5–30 mm, half circumferences ranged from 36.5–45.5 mm. For arc lengths of 11.5–23.5 mm, corresponding chord lengths were 10–20 mm, with no significant correlation with axial length. Clinically, retinal reattachment was achieved in 42/43 patients (97.7%), with postoperative fundoscopy confirming effective FCB indentation.

Visual acuity improved significantly from a preoperative median of 0.10 (range: hand motion to 0.8) to a postoperative median of 0.40 (range: counting fingers to 1.0) (Z = 5.43, p < 0.001), with 88.4% of patients showing improvement. Intraocular pressure (IOP) increased mildly from 12.6 ± 2.7 mmHg preoperatively to 14.7 ± 1.6 mmHg postoperatively (mean increase: 2.1 mmHg; 95% CI: 1.4–2.8 mmHg; t = 5.12, p < 0.001), with all values remaining within the normal range.

Application of Three-Dimensional Reconstruction for Localizing Retinal Tears in Foldable Capsular Buckle (FCB) Surgery for Rhegmatogenous Retinal Detachment provides a quantifiable and reproducible method for retinal tear localization in scleral buckling surgery for rhegmatogenous retinal detachment, thereby effectively promoting the standardized clinical application of the foldable capsular buckle.

Traditional tear localization relies heavily on the surgeon’s experience and lacks objective evidence, which can easily lead to inaccuracies, especially in cases with complex anatomical structures or high myopia. In contrast, this study established quantitative relationships among ocular axial length, chord length, and arc length through 3D reconstruction and geometric modeling, and converted these complex calculations into a simple procedure using only a mobile phone and a ruler. As a result, preoperative localization no longer depends on expensive equipment or extensive surgical experience.

More importantly, this method offers a supporting standardized preoperative planning scheme for FCB, an innovative minimally invasive surgical technique, making operations more precise, safe and predictable.

This research not only shortens the learning curve and lowers the technical threshold of FCB surgery, but also lays a solid foundation for its standardized promotion in primary hospitals and among special populations (such as children, pregnant women, and highly myopic patients), truly realizing a minimally invasive, precise and reproducible clinical pathway.