角膜后表面散光的评估方法及临床特征的研究进展

Assessment and Clinical Characteristics of Posterior Corneal Astigmatism

角膜散光的精准评估在屈光和白内障手术中具有重要的临床意义。以往由于理论认识的不足和检查设备的局限性, 低估了角膜后表面散光(PCA)对整体角膜散光评估所带来的影响。近年来, 基于不同原理的多种设备实现了对角膜后表面信息的直接或间接采集, 其在临床和科研中的广泛应用使PCA的分布特点及规律逐渐清晰。现对PCA的评估方法和临床特征作一综述, 旨在提高临床实践中对PCA的认识和重视。

Accurate assessment of corneal astigmatism has great clinical implications in procedures such as refractive and cataract surgery.The influence of posterior corneal astigmatism(PCA)on the overall corneal astigmatism assessment was underestimated due to the lack of theoretical understanding and the limitations of examination equipment.In recent years,various devices based on different principles have realized the direct or indirect collection of corneal posterior surface information.Their wide application in clinical and scientific research has made the distribution characteristics and rules of PCA gradually clear.This article reviews the assessment methods and clinical characteristics of PCA,aiming to improve the understanding of these factors and bring attention to them in clinical practice.