Comparison of Predictability in Vault Using NK Formula and KS Formula for the Implantable Collamer Lens Surgery.

IF 1.8 4区医学 Q3 OPHTHALMOLOGY

Journal of Ophthalmology Pub Date : 2024-07-27 eCollection Date: 2024-01-01 DOI:10.1155/2024/4256371

Xin Zhong, Yan Li, Yuancun Li, Geng Wang, Yali Du, Mingzhi Zhang

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引用次数: 0

Abstract

Background: This study aims to investigate the agreement between the NK and KS formulas in predicting the vault after implantation of an EVO-implantable collamer lens (ICL).

Methods: This retrospective study included 106 eyes of 57 patients who underwent ICL-V4c implantation. Preoperative vault prediction was conducted by utilizing the NK and KS formulas, with postoperative measurements by anterior segment optical coherence tomography (AS-OCT) at one month. The analysis focused on the consistency between predicted and achieved vaults, as well as the correlation between the achieved vault and various biometric parameters.

Results: The mean achieved vault was 605.25 ± 212.72 µm, which was significantly smaller than the predicted vaults of 710.08 ± 195.08 and 673.80 ± 212.76 µm, using the NK and KS formulas, respectively (P < 0.05). The mean differences between the achieved vault and the predicted vault using the NK formula and KS formula were -104.82 μm (95% LoA: -600.38-391.19 μm) and -68.55 μm (95% LoA: -628.91-491.82 μm), respectively. Anterior chamber depth (ACD), vertical sulcus-to-sulcus (V-STS) diameter, and crystalline lens rise (CLR) were independent factors associated with the achieved vault (P < 0.05). The two formulas showed no statistically significant difference in absolute prediction error (APE).

Conclusion: The NK formula exhibited superior consistency and low predictive error compared to the KS formula in the 12.6 mm ICL group. AS-OCT measurements overestimated the predicted ICL vault, especially in the 13.2 mm ICL size selection. Relying solely on the NK or KS formulas for predicting vaults before ICL surgery is not recommended.

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使用 NK 公式和 KS 公式比较植入式角膜板层透镜手术的穹窿预测能力

背景：本研究旨在探讨NK和KS公式在预测EVO植入式有晶体眼人工晶体（ICL）植入后的穹窿方面的一致性：本研究旨在探讨NK和KS公式在预测植入EVO-可植入性准分子晶体（ICL）后穹窿的一致性：这项回顾性研究纳入了57名接受ICL-V4c植入术的患者的106只眼睛。采用 NK 和 KS 公式进行术前穹窿预测，术后一个月通过前节光学相干断层扫描（AS-OCT）进行测量。分析的重点是预测穹窿与实际穹窿之间的一致性，以及实际穹窿与各种生物测量参数之间的相关性：获得的平均穹隆为 605.25 ± 212.72 µm，明显小于使用 NK 和 KS 公式分别预测的 710.08 ± 195.08 µm 和 673.80 ± 212.76 µm（P < 0.05）。使用 NK 公式和 KS 公式得出的穹窿与预测穹窿的平均差值分别为 -104.82 μm（95% LoA：-600.38-391.19 μm）和 -68.55 μm（95% LoA：-628.91-491.82 μm）。前房深度（ACD）、垂直沟到沟（V-STS）直径和晶状体上升（CLR）是与穹窿大小相关的独立因素（P < 0.05）。两种公式在绝对预测误差（APE）方面没有统计学意义上的显著差异：结论：与 KS 公式相比，NK 公式在 12.6 毫米 ICL 组中表现出更高的一致性和更低的预测误差。AS-OCT 测量高估了预测的 ICL 拱顶，尤其是在选择 13.2 mm ICL 尺寸时。不建议在 ICL 手术前仅依靠 NK 或 KS 公式预测穹窿。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Ophthalmology MEDICINE, RESEARCH & EXPERIMENTAL-OPHTHALMOLOGY

CiteScore

4.30

自引率

5.30%

发文量

194

审稿时长

6-12 weeks

期刊介绍： Journal of Ophthalmology is a peer-reviewed, Open Access journal that publishes original research articles, review articles, and clinical studies related to the anatomy, physiology and diseases of the eye. Submissions should focus on new diagnostic and surgical techniques, instrument and therapy updates, as well as clinical trials and research findings.