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Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified March 2012 by China Medical University, China.
Recruitment status was:  Recruiting
Information provided by (Responsible Party):
Jinsong Zhang, China Medical University, China Identifier:
First received: February 27, 2012
Last updated: March 13, 2012
Last verified: March 2012

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.

Condition Intervention Phase
Procedure: phacoemulsification
Device: Pentacam (Oculus,Germany)examination
Phase 4

Study Type: Interventional
Study Design: Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

Further study details as provided by China Medical University, China:

Primary Outcome Measures:
  • Pentacam-derived corneal astigmatism [ Time Frame: 3month postoperatively ]
  • refraction [ Time Frame: 3month postoperatively ]

Estimated Enrollment: 30
Study Start Date: February 2012
Estimated Primary Completion Date: May 2012 (Final data collection date for primary outcome measure)
Intervention Details:
    Procedure: phacoemulsification
    After topical anesthesia with Alcaine, 3.0-mm clear corneal incisions were made. Torsional phacoemulsification was performed using the Infiniti Vision System with the OZil handpiece, a 45-degree Kelman miniflared tip, and DuoVisc viscoelastic (all from Alcon).
    Device: Pentacam (Oculus,Germany)examination
    Total corneal astigmatism is obtained by Pentacam at every visit.

Ages Eligible for Study:   18 Years to 80 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

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
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01554761

Contact: Qi Sun, MD +86 15840336028

China, Liaoning
Eye hospital of China Medical Univerisity Recruiting
Shenyang, Liaoning, China, 110005
Contact: Jinsong Zhang, MD    +86 13066667486      
Sub-Investigator: Qi Sun, MD         
Sub-Investigator: Cheng Peng, MD         
Sub-Investigator: Jiangyue Zhao, MD         
Sub-Investigator: Liwei Ma, MD.PhD         
Sponsors and Collaborators
China Medical University, China
Principal Investigator: Jinsong Zhang, MD Eye Hospital of China Medical University
  More Information

Responsible Party: Jinsong Zhang, MD,the President of Eye hosptial of China Medical Univerisity,China, China Medical University, China Identifier: NCT01554761     History of Changes
Other Study ID Numbers: 2
Study First Received: February 27, 2012
Last Updated: March 13, 2012

Keywords provided by China Medical University, China:

Additional relevant MeSH terms:
Lens Diseases
Eye Diseases
Refractive Errors
Signs and Symptoms processed this record on May 24, 2017