Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

March 13, 2012 updated by: Jinsong Zhang, China Medical University, China

This study is to evaluate the necessity of considering posterior corneal toricity on refractive outcome of patients with cataracts and corneal astigmatism after implantation of intraocular lenses.

This is determined by comparing total corneal and refractive astigmatism,and by comparing the expected refractive result with actual refractive astigmatism postoperatively,using total corneal and anterior corneal astigmatism to calculate respectively.

Study Overview

Status

Unknown

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Anticipated)

30

Phase

  • Phase 4

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • China
    • Liaoning
      • Shenyang, Liaoning, China, 110005
        • Recruiting
        • Eye hospital of China Medical Univerisity
        • Contact:
          • Jinsong Zhang, MD
          • Phone Number: +86 13066667486
        • Sub-Investigator:
          • Qi Sun, MD
        • Sub-Investigator:
          • Cheng Peng, MD
        • Sub-Investigator:
          • Jiangyue Zhao, MD
        • Sub-Investigator:
          • Liwei Ma, MD.PhD

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • cataract candidates
  • preoperative corneal regular astigmatism >0.75D
  • Willing and able to complete all required postoperative visits
  • Able to comprehend and sign a statement of informed consent

Exclusion Criteria:

  • significant intraocular lenses tilt or decentration
  • corneal scarring
  • Irregular corneal astigmatism
  • other ocular diseases
  • surgical complication

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Pentacam-derived corneal astigmatism
Time Frame: 3month postoperatively
3month postoperatively
refraction
Time Frame: 3month postoperatively
3month postoperatively

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

China Medical University, China

Investigators

  • Principal Investigator: Jinsong Zhang, MD, Eye Hospital of China Medical University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

February 1, 2012

Primary Completion (Anticipated)

May 1, 2012

Study Registration Dates

First Submitted

February 27, 2012

First Submitted That Met QC Criteria

March 13, 2012

First Posted (Estimate)

March 15, 2012

Study Record Updates

Last Update Posted (Estimate)

March 15, 2012

Last Update Submitted That Met QC Criteria

March 13, 2012

Last Verified

March 1, 2012

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 2 (Other Identifier: Instituto Cardiovascular de Buenos Aires)

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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