Study on the Accuracy of Intraocular Lens Calculation Formula

Second Affiliated Hospital, School of Medicine, Zhejiang University500 enrolled

Overview

In this study, we will retrospectively collect patients who have performed phacoemulsification combined with intraocular lens implantation in our hospital, collect various preoperative biometric data and postoperative refractive data of patients, conduct statistical analysis, and compare the accuracy of various IOL calculation formulas.

Study Type

OBSERVATIONAL

Enrollment

500

Conditions

the Accuracy of Intraocular Lens Calculation Formula

Interventions

Several Calculation Formulas of Intraocular LensOTHER

Comparison of the accuracy of several intraocular lens calculation formulas

Eligibility

Sex: ALLMin age: 18 YearsMax age: 90 YearsHealthy volunteers:

Medical Language ↔ Plain English

Inclusion Criteria: * (1) Conform to the diagnosis of cataract; (2) No complications occurred during and after operation; (3) Before and after operation, the measurement of ocular biological characteristics and refractive state can be successfully completed; (4) Patients who can be followed up regularly after operation. Exclusion Criteria: * (1) Serious intraoperative or postoperative complications; (2) Complicated with other eye diseases unsuitable for intraocular lens implantation; (3) Patients with systemic diseases cannot tolerate surgery; (4) Patients with incomplete follow-up data.

Locations (1)

Second Affiliated Hospital, Zhejiang University School of Medicine

Hangzhou, Zhejiang, China

RECRUITING

Outcomes

Primary Outcomes

Mean absolute error

The Friedman test was applied to compare the median absolute error between the formulas after the zeroing of the mean numerical error. Post hoc analysis and Bonferroni correction was performed for multiple comparisons.

Time frame: 1 week、1 month and 3 months postoperation

Secondary Outcomes

Distribution of error within ± 0.25D, ± 0.5D, ± 0.75D,and ± 1.0D

Frequency comparisons were made with the chi-square test

Time frame: 1 week、1 month and 3 months postoperation

Central Contacts

Wen Xu, PHD

CONTACT

13858185223 xuwen2003@zju.edu.cn

Data from ClinicalTrials.gov

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