The accuracy of postoperative diopter in cataract patients with high myopia after femtosecond laser-assisted cataract surgery

Abstract

Objective To compare the accuracy of postoperative diopter after femtosecond laser-assisted cataract surgery and conventional phacoemulsification cataract surgery in cataract patients with high myopia. Methods In this prospective cohort study, 63 cataract patients (63 eyes) with high myopia who underwent cataract surgery were enrolled. Patients were distributed into femtosecond laser-assisted cataract surgery (31 eyes) and conventional phacoemulsification cataract surgery (32 eyes). The predicted postoperative diopter, actual postoperative diopter at 1 month and 3 months were recorded, as well as uncorrected visual acuity (UCVA) and best corrected visual acuity (BCVA). Refractive errors, mean absolute error (MAE) were calculated. Data were analyzed using independent t test, paired t test and rank sum test. Results The differences of patients' demographics parameters(age, intraocular pressure, axial length) were not significant between the two groups. The differences of refractive error, MAE, UCVA and BCVA at 1 month and 3 months postoperation were not significant between the two groups. The MAE of 16 eyes (25%) are greater than 1.0 D. The differences of refractive error and MAE in the two groups were not significant between 1 month and 3 months after surgery. Conclusion Femtosecond laser-assisted cataract surgery did not demonstrate clinically meaningful improvement in accuracy of postoperative diopter and visual acuity over tranditional phacoemulsification in high myopic patients. Key words: Cataract; Myopia, degenerative; Femtosecond laser; Mean absolute error