ĐÁNH GIÁ KẾT QUẢ CHỈNH LOẠN THỊ GIÁC MẠC BẰNG CÁC ĐƯỜNG RẠCH GIÁC MẠC HÌNH CUNG TRONG PHẪU THUẬT THỦY TINH THỂ SỬ DỤNG LASER FEMTOSECOND

Abstract

Purpose: To assess the results of using femtosecond laser-assisted arcuate keratotomy alongside cataract surgery in eyes with low to moderate corneal astigmatism. Method: This uncontrolled prospective interventional study involved 47 eyes of 43 patients with preexisting corneal astigmatism ranging from 0.75D to 3D. The patients underwent femtosecond laser-assisted arcuate keratotomy combined with cataract surgery at Hong Son Eye Hospital. The study recorded parameters such as the magnitude and axis of corneal astigmatism, uncorrected (UDVA) and corrected (CDVA) distance visual acuities before the surgery and at 1 week, 1 month, and 3 months after the surgery. Astigmatic analyses were performed using the Alpins method. Results: The corneal astigmatism was significantly reduced from 1.52 ± 0.40D before the operation to 0.66 ± 0.44D three months after the operation (p < 0.001). The uncorrected distance visual acuity (UDVA) improved from 1.28 ± 0.41 logMAR to 0.21 ± 0.18 logMAR postoperatively (p < 0.001). Astigmatism, as calculated by vector astigmatism analysis, showed that the difference vector (DV) and absolute angle of error (AE) improved up to 3 months postoperatively. A correction index (CI) greater than 0 suggests that overcorrection occurred. 89% of eyes had AE within 15 degrees. No intraoperative or postoperative complications were recorded. Conclusion: Femtosecond laser-assisted arcuate keratotomy is a safe and effective method for treating low to moderate corneal astigmatism; however, further studies are required to assess stability and refine the nomogram