the Accuracy of Intraocular Lens Calculation Formula
Conditions
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.
Interventions
OTHERSeveral Calculation Formulas of Intraocular Lens
Comparison of the accuracy of several intraocular lens calculation formulas
Sponsors
Second Affiliated Hospital, School of Medicine, Zhejiang University
Study design
Observational model
OTHER
Time perspective
RETROSPECTIVE
Eligibility
Sex/Gender
ALL
Age
18 Years to 90 Years
Healthy volunteers
Yes
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.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| 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
| Measure | Time frame | Description |
|---|---|---|
| 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 |
Countries
China
Contacts
Primary ContactWen Xu, PHD
Outcome results
None listed