Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

NCT ID: NCT01554761

Last Updated: 2012-03-15

Basic Information

• Recruitment Status: UNKNOWN
• Clinical Phase: PHASE4
• Total Enrollment: 30 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2012-02-29

Brief Summary

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.

Conditions

Astigmatism; Cataract

Study Design

• Allocation Method: NA
• Intervention Model: SINGLE_GROUP
• Primary Study Purpose: TREATMENT
• Blinding Strategy: NONE

Interventions

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).

Intervention Type: PROCEDURE

Pentacam (Oculus,Germany)examination

Total corneal astigmatism is obtained by Pentacam at every visit.

Intervention Type: DEVICE

Eligibility Criteria

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

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 80 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: No

Sponsors

China Medical University, China

OTHER

Sponsor Role: lead

Responsible Party

Jinsong Zhang

MD,the President of Eye hosptial of China Medical Univerisity,China

Responsibility Role: PRINCIPAL_INVESTIGATOR

Principal Investigators

Jinsong Zhang, MD

Role: PRINCIPAL_INVESTIGATOR

Eye Hospital of China Medical University

Locations

Eye hospital of China Medical Univerisity

Shenyang, Liaoning, China

Site Status: RECRUITING

Countries

China

Central Contacts

Qi Sun, MD

Role: CONTACT

qisun97@sina.com

+86 15840336028

Facility Contacts

Jinsong Zhang, MD

Role: primary

+86 13066667486

Other Identifiers

2

Identifier Type: -

Identifier Source: org_study_id