Comparisons of the Astigmatic Power of Toric Intraocular Lens Using Three Toric Calculators: AcrySof, TECNIS, and iTrace Toric Calculator

Completed

• Conditions: Cataract; Astigmatism

• Registration Number: NCT01978106
• Lead Sponsor: Yonsei University

Brief Summary

Purpose of this study is to compare the astigmatic power of the toric IOL obtained from the AcrySof toric calculator, TECNIS toric calculator, and iTrace toric calculator in a group of patients with preoperative with-the-rule (WTR) and against-the-rule (ATR) corneal astigmatism. The study included 100 eyes with cataract and greater than 0.75 diopter of corneal astigmatism, and the subjects were divided into WTR and ATR group. Keratometric value was measured using autokeratometry, IOLMaster partial coherence interferometry (PCI), iTrace incorporating corneal topography and ray-tracing aberrometry. Based on measured values, toric IOL power calculations were performed using AcrySof, TECNIS and iTrace toric calculators.

Detailed Description

Not available

Basic Information
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Recruitment & Eligibility
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Study & Design
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Trial Locations

Study Timeline

• Study Start: 2013-01
• Primary Completion: 2013-04
• Study Completion: 2013-04
• Study First Submitted: 2013-10-31
• Status Verified: 2013-11
• Study First Submitted QC: 2013-11-06
• Last Update Submitted: 2013-11-06
• Study First Posted: 2013-11-07
• Last Update Posted: 2013-11-07

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 100

Inclusion Criteria

• Subjects who planned to undergo cataract removal by phacoemulsification
• Subjects with preoperative corneal astigmatism greater than 0.75 D, as determined by autokeratometry

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Exclusion Criteria

• Subjects with more than 2.74 D of corneal keratometric value from autokeratometry
• a history of intraocular or corneal surgery and ocular trauma
• biomicroscopic evidence of corneal disease that could affect corneal astigmatisms
• contact lens wearer

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Study & Design

• Study Type: OBSERVATIONAL
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Difference of toric intraocular lens power between three toric calculators	Immediately after measurement	Comparison of the toric intraocular lens power calculated from Acrysof and TECNIS toric calculators using keratometric values measured by autokeratometry or IOLMaster PCI and that from iTrace toric calculator with keratometric value measurement using iTrace ray tracing wavefront aberrometry and iTrace simulated keratometry.

Trial Locations

Locations (1)

Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine; 🇰🇷 Seoul, Korea, Republic of