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

Study Results

Results pending

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Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

100 participants

Study Classification

OBSERVATIONAL

Study Start Date

2013-01-31

Study Completion Date

2013-04-30

Brief Summary

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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

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Conditions

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Cataract Astigmatism

Keywords

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toric calculator toric intraocular lens power Acrysof Tecnis iTrace

Study Design

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Observational Model Type

COHORT

Study Time Perspective

RETROSPECTIVE

Study Groups

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a WTR corneal astigmatism group

Corneal astigmatism was defined as WTR when the steep corneal cylinder axis was within 30 degrees of the horizontal axis.

No interventions assigned to this group

an ATR corneal astigmatism group

Corneal astigmatism was defined as ATR when the cylinder axis was within 30 degrees of the vertical axis.

No interventions assigned to this group

Eligibility Criteria

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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

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

Minimum Eligible Age

33 Years

Maximum Eligible Age

87 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Responsible Party

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Responsibility Role SPONSOR

Locations

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Institute of Vision Research, Department of Ophthalmology, Yonsei University College of Medicine

Seoul, , South Korea

Site Status

Countries

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South Korea

Other Identifiers

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1-2013-0041

Identifier Type: -

Identifier Source: org_study_id