Abstract:  Objective To investigate the accuracy of intraocular lens (IOL) power prediction formulas in patients with short eyes (axial length <22.00 mm). Design Prospective case series study. Participants 51 patients (56 eyes) with short axial length who underwent phacoemulsification and posterior chamber single-piece monofocal IOL implantation surgery at Xi'an People's Hospital from December 2021 to May 2023. Methods The axial length, corneal curvature, central anterior chamber depth, and lens thickness were measured with IOLMaster700. Postoperative refractive error was predicted using Holladay2, Haigis, and Barrett Universal II formulas. The best corrected visual acuity was converted into LogMAR visual acuity for statistical analysis. Subjective optometry examination was performed at 3 months postoperatively. The errors in predicting refraction using the Haigis, Holladay 2, and Barrett Universal II formulas were compared. Main Outcome Measures Refractive prediction error and absolute prediction error. Results The average central anterior chamber depth preoperatively was (2.2±0.2) mm, which significantly increased to (3.8±0.3) mm at 3 months postoperatively (t=25.7, P<0.001). There were no statistically significant differences in prediction error and absolute prediction error among the three formulas (all P>0.05). The Haigis formula showed 76.9% of prediction errors distributed within ±0.50 D, which was better than the Holladay 2 formula (50.0% within ±0.50 D) and the Barrett Universal II formula (57.6% within ±0.50 D). Conclusion The accuracy of IOL formulas (Haigis, Holladay 2, Barrett Universal II) based on IOLMaster700 is relatively high in patients with short axial length. (Ophthalmol CHN, 2024, 33: 377-381)

Key words: short eyes, intraocular lens power formula, cataract