June 19, 2026 · American journal of ophthalmology · DOI: 10.1016/j.ajo.2026.06.026

Axial Length Adjustment and AL/R Ratio Optimization of IOL Power Calculation in Extremely Long Eyes

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The authors aimed to evaluate the accuracy of modern intraocular lens (IOL) power calculation formulas and axial length (AL) adjustment methods in eyes with an AL of 30.0 mm or greater. They found that the Holladay 1 formula combined with the Wang-Koch axial length adjustment provided the best predictive accuracy, while the AL-to-corneal radius (AL/R) ratio emerged as a significant factor influencing prediction errors across various formulas. This study highlights the importance of using appropriate methods for IOL power calculation in extremely long eyes to improve surgical outcomes.

Yingyan Qin, Lu Qin, Xiaoran Zhao, Yujie Ding, Liangping Liu, Mingxing Wu

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