Effect of Posterior Corneal Toricity on Refractive Outcome of Pseudophakia

China Medical University, China

Status and phase: Unknown; Phase 4

Conditions: Cataract; Astigmatism

Treatments: Device: Pentacam (Oculus,Germany)examination; Procedure: phacoemulsification

Study type: Interventional

Funder types: Other

Identifiers

NCT01554761

2

Details and patient eligibility

About

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.

Enrollment: 30 estimated patients

Sex: All

Ages: 18 to 80 years old

Volunteers: No Healthy Volunteers

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

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)