Surgically Induced Astigmatism of Temporal Versus Nasal Clear Corneal Phacoemulsification

Not Applicable

Completed

• Conditions: Surrgical Induced Astigmatism
• Interventions: Procedure: phacoemulsification and intraocular lens implantation

• Registration Number: NCT00521833
• Lead Sponsor: Shahid Beheshti University of Medical Sciences

Brief Summary

To compare the short-term astigmatic outcomes of phacoemulsification cataract surgery and intraocular lens implantation using temporal versus nasal clear corneal incisions.

Detailed Description

In a clinical trial, consecutive eyes with senile cataract underwent phacoemulsification with implantation of a 6.0 mm foldable hydrophobic acrylic intraocular lens through a 3.2 mm horizontal clear cornea incision at 180 degrees (temporal incision in right eyes, nasal incision in left eyes). Keratometric astigmatism was measured preoperatively and one and four weeks and 6 months after surgery. Surgically induced astigmatism (SIA) was calculated by the vector analysis method using the Holladay-Cravy-Koch formula. Patients with history of diabetes mellitus, connective tissue disorders, steroid use, previous ocular surgery, with the rule astigmatism \>1D, pseudoexfoliation and any corneal pathology were excluded.

Study Timeline

• Study Start: 2005-06
• Study Completion: 2006-08
• Status Verified: 2007-08
• Study First Submitted: 2007-08-27
• Study First Submitted QC: 2007-08-27
• Study First Posted: 2007-08-28
• Last Update Submitted: 2007-09-04
• Last Update Posted: 2007-09-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 20

Inclusion Criteria

• All the patients with senile cataract

Exclusion Criteria

• Previously operated eyes
• Presence of corneal pathology
• Pseudo exfoliation
• With-the-rule (WTR) astigmatism >1 D
• Presence of diabetes mellitus
• History of connective tissue disease
• Consumption of systemic steroids

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
2	phacoemulsification and intraocular lens implantation	Nasal (Left eye)
1	phacoemulsification and intraocular lens implantation	Temporal (right eye)

Primary Outcome Measures

Name	Time	Method
Total and Surgical Induced Astigmatism	At 1 and 4 weeks and 6 month after surgery

Trial Locations

Locations (1)

Ophthalmic research center; 🇮🇷 Tehran, Iran, Islamic Republic of