Mu Jiancheng, Yang Yu, Xiong Tianxu, Fan Wei
Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China.
Front Med (Lausanne). 2022 Aug 17;9:926792. doi: 10.3389/fmed.2022.926792. eCollection 2022.
We report a case of a man with cataract and anterior megalophthalmos (AM), in which some myopia was retained when calculating intraocular lens (IOL) power using the Haigis formula to avoid postoperative farsightedness.
A 59-year-old Chinese man was referred to our clinic for cataract surgery in his right eye. He had strong bilateral megalocornea, and his left eye had undergone surgery four times. After complete preoperative examinations and repeated biometry, the Haigis formula was used, and a 3-piece IOL was implanted with a target power of -1.97 D. At 1-year follow-up, the patient showed the best-corrected distance vision of 20/20 with the refraction of -1.50 DC × 160°, and the IOL was stable.
Our patient with anterior megalophthalmos showed postoperative hyperopia drift even though the Haigis formula was used as suggested in previous studies. To prevent farsightedness after surgery, some myopia should be retained when calculating IOL power. The Kane, Holladay II with AL adjustment, and Barrett Universal II formulas may be more accurate for calculating IOL power in such patients.
我们报告一例患有白内障和先天性大眼球（AM）的男性病例，在使用海吉斯公式计算人工晶状体（IOL）度数时保留了一定近视度数，以避免术后远视。
一名59岁的中国男性因右眼白内障手术转诊至我们的诊所。他双眼角膜巨大，左眼已接受过四次手术。经过全面的术前检查和多次生物测量后，使用海吉斯公式，并植入了一片式IOL，目标度数为-1.97D。在1年的随访中，患者最佳矫正远视力为20/20，验光结果为-1.50DC×160°，IOL位置稳定。
尽管按照先前研究建议使用了海吉斯公式，但我们这位先天性大眼球患者术后仍出现了远视漂移。为防止术后远视，在计算IOL度数时应保留一定近视度数。对于此类患者，凯恩公式、调整眼轴长度后的霍拉迪II公式和巴雷特通用II公式在计算IOL度数时可能更准确。
