NCT04340635|Unknown
Multi-center Ocular Biological Parameters Study
Analysis of Eye Bioparametric Data of Chinese Population Based on Big Data
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Analysis of Eye Bioparametric Data of Chinese Population Based on Big Data
Sponsor study identifier
observational
20,000
1 country
1
Study Start
January 1, 2018
Actual (reported)Primary Completion
October 1, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Study Completion
December 31, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
This study is a multi-center study, which collects data from multiple regions to obtain the general biological characteristics of the Chinese population. The formula for calculating the artificial lens power based on foreign populations is effectively modified based on the Chinese population.
Registry-reported information. Elapsed time and enrollment totals alone do not measure study progress or recruitment pace.
December 31, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
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Dates and qualifiers reported by the registry. Estimated dates do not confirm that a milestone has occurred.
January 1, 2018
Actual (reported)March 29, 2020
Actual (reported)April 9, 2020
Actual (reported)October 1, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
December 31, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
axial length (AL)
Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)
1 hour
anterior chamber depth (ACD)
Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)
1 hour
keratometric power (K)
Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)
1 hour
corneal astigmatism (CA)
Measured using the partial coherence laser interferometry (IOLMaster, Carl Zeiss Meditec, Germany)
1 hour
Without intervention
Select elderly cataract patients from different regions of China (at least one representative city in each of east, south, west, north, and central China) who were treated in Aier Eye Hospital.
Shanghai Aier Eye Hospital
Shanghai, Shanghai Municipality, 200000, China
Qian Z, Xie X, Yang J, Ye H, Wang Z, Chen J, Liu H, Liang J, Jiang L, Zheng C, Chen X. Detection of shallow anterior chamber depth from two-dimensional anterior segment photographs using deep learning. BMC Ophthalmol. 2021 Sep 22;21(1):341. doi: 10.1186/s12886-021-02104-0.
First Submitted
March 29, 2020
First Posted
April 9, 2020
Study Start
January 1, 2018
Actual (reported)Primary Completion
October 1, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Effect of 1.8-mm Steep-axis Clear Corneal Incision on the Posterior Corneal Astigmatism in Candidates for Toric IOL Implantation
Contact the study team to confirm eligibility.
Study Completion
December 31, 2020
Estimated (date passed)This estimate has passed. The registry has not confirmed an actual date for this milestone.
Last Updated
April 9, 2020
Record last verified: 2020-04
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Source: ClinicalTrials.gov.
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