Study on the Accuracy of Intraocular Lens Calculation Formula

Recruiting

• Conditions: the Accuracy of Intraocular Lens Calculation Formula

• Registration Number: NCT05672693
• Lead Sponsor: Second Affiliated Hospital, School of Medicine, Zhejiang University

Brief Summary

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.

Detailed Description

Not available

Study Timeline

• Status Verified: 2023-01
• Study Start: 2023-01
• Study First Submitted: 2023-01-03
• Study First Submitted QC: 2023-01-03
• Last Update Submitted: 2023-01-03
• Study First Posted: 2023-01-05
• Last Update Posted: 2023-01-05
• Primary Completion: 2024-12
• Study Completion: 2024-12

Recruitment & Eligibility

• Status: RECRUITING
• Sex: All
• Target Recruitment: 500

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.

Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Mean absolute error	1 week、1 month and 3 months postoperation	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.

Secondary Outcome Measures

Name	Time	Method
Distribution of error within ± 0.25D, ± 0.5D, ± 0.75D,and ± 1.0D	1 week、1 month and 3 months postoperation	Frequency comparisons were made with the chi-square test

Trial Locations

Locations (1)

Second Affiliated Hospital, Zhejiang University School of Medicine; 🇨🇳 Hangzhou, Zhejiang, China