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Introduction <p>The aim of this study was to investigate the magnitude and quadrantal distribution of angle kappa in patients with cataracts and high myopia (axial length ≥ 26&#xa0;mm).</p> Methods <p>A total of 2485 patients with cataracts and high myopia and 354 patients with cataracts without high myopia (axial length &lt; 26&#xa0;mm) were included in this study. The location and value of angle kappa were determined using an Oculus Pentacam HR. An angle kappa distance exceeding 0.5&#xa0;mm was defined as a large angle kappa distance.</p> Results <p>In high myopic eyes, multivariable linear regression analysis revealed that a larger angle kappa distance was significantly associated with longer axial length (standardized regression coefficient [<i>β</i>]&#xa0;= 0.24), narrower white-to-white (<i>β</i>&#xa0;=  −0.08), lower keratometry (<i>β</i>&#xa0;=  −0.08), higher corneal astigmatism (<i>β</i>&#xa0;= 0.06), and older age (<i>β</i>&#xa0;= 0.06) (all <i>P</i> &lt; 0.01). The axial length cutoff point with the maximum Youden Index indicating the presence of a large angle kappa distance was 30&#xa0;mm (area under the curve = 0.64). In high myopic eyes, the most common regions of angle kappa relative to the pupillary axis were the temporal-superior (40%) and temporal-inferior (26%) quadrants. However, in non-high myopic eyes, the most frequent regions were the nasal-superior (31%) and nasal-inferior (31%) quadrants.</p> Conclusions <p>An axial length of ≥ 30&#xa0;mm is a risk factor for the presence of an angle kappa distance greater than 0.5&#xa0;mm. In high myopic eyes, the most common location of angle kappa is the temporal-superior quadrant relative to the pupil center.</p>

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Angle Kappa in Patients with Cataracts and High Myopia

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年2月9日

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  • Ao Miao,
  • Dongjin Qian,
  • Jiajia Huang,
  • Tianhui Chen,
  • Junjie Xie,
  • Likun Lin,
  • Jie Xu,
  • Yongxiang Jiang

摘要

Introduction

The aim of this study was to investigate the magnitude and quadrantal distribution of angle kappa in patients with cataracts and high myopia (axial length ≥ 26 mm).

Methods

A total of 2485 patients with cataracts and high myopia and 354 patients with cataracts without high myopia (axial length < 26 mm) were included in this study. The location and value of angle kappa were determined using an Oculus Pentacam HR. An angle kappa distance exceeding 0.5 mm was defined as a large angle kappa distance.

Results

In high myopic eyes, multivariable linear regression analysis revealed that a larger angle kappa distance was significantly associated with longer axial length (standardized regression coefficient [β] = 0.24), narrower white-to-white (β =  −0.08), lower keratometry (β =  −0.08), higher corneal astigmatism (β = 0.06), and older age (β = 0.06) (all P < 0.01). The axial length cutoff point with the maximum Youden Index indicating the presence of a large angle kappa distance was 30 mm (area under the curve = 0.64). In high myopic eyes, the most common regions of angle kappa relative to the pupillary axis were the temporal-superior (40%) and temporal-inferior (26%) quadrants. However, in non-high myopic eyes, the most frequent regions were the nasal-superior (31%) and nasal-inferior (31%) quadrants.

Conclusions

An axial length of ≥ 30 mm is a risk factor for the presence of an angle kappa distance greater than 0.5 mm. In high myopic eyes, the most common location of angle kappa is the temporal-superior quadrant relative to the pupil center.