Study Of Corneal Refractive Changes Following Scleral Encircling With Additional Segmental Buckling Surgery

Purpose: A prospective study was performed to investigate corneal refractive changes following scleral encircling with additional segmental buckling surgery.Methods: We investigated the changes in corneal refractive power, astigmatic power and astigmatic axial of anterior surface and posterior surface following scleral encircling with additional segmental buckling surgery in 28 patients (29 eyes). The corneal shape was detected by Orbscan II topography before surgery, and 1 week, 1 month and 3 months after surgery. Analyze the effects of some surgical factors in the changes of corneal refractive power, astigmatic power and astigmatic axial with anterior surface and posterior surface.Results: After surgery, on corneal anterior surface, refractive power decreased in short terms and obviously in periphery zone; astigmatic power increased, obviously in central zone; and the direction of astigmatic axial matched the direction of the buckle, obviously in central zone in short terms. On corneal posterior surface, refractive power seemed no obvious shifting; astigmatic power increased, evident and persisting in central zone; and the direction of astigmatic axial shifted to the direction of thebuckle in short terras. There was a tendency for the buckle width to be positive associated with refractive power changes of corneal anterior surface, and the effect was clear in central zone in short terms; the distance between the limbus and the buckle was positive associated with astigmatic power changes in corneal anterior and posterior central zone; the encircling length was negative associated with refractive power changes on corneal posterior surface and with astigmatic power changes on corneal anterior surface; and, the buckle range was associated with the change of astigmatic axial.Conclusions: Corneal refractive changes following scleral encircling with additional segmental buckling surgery was somewhat temporary, so we could consider the surgery is effective and safe for simple rhegmatogenous retinal detachment. Surgeons should select a surgical procedure to ensure favorable postoperative visual acuity while minimizing changes in the shape of cornea.