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

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.

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Key information

Conditions

Cataract Astigmatism Eye Diseases Lens Diseases Refractive Errors

Age range

33 year–87 year

Sex eligibility

All sexes

Study type

Observational

Primary location

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

Seoul, 120-752, South Korea

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

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

Treatment and study plan

Primary outcomes

Difference of toric intraocular lens power between three toric calculators

Time frame: 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.

Sponsors and collaborators

Lead sponsor

Yonsei University

Other

Registry information

Important dates

Study start: 2013
Primary completion: 2013
Study completion: 2013
First posted: Nov 7, 2013
Registry last updated: Nov 7, 2013

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed