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

Status

Completed

Phases

Unknown

Study type

Observational

Source

ClinicalTrials.gov

Registry ID

NCT01978106

Enrollment

100

Registered

2013-11-07

Start date

2013-01-31

Completion date

2013-04-30

Last updated

2013-11-07

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Astigmatism, Cataract

Keywords

toric calculator, toric intraocular lens power, Acrysof, Tecnis, iTrace

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.

Interventions

None listed

Study design

Observational model

COHORT

Time perspective

RETROSPECTIVE

Eligibility

Sex/Gender

ALL

Age

33 Years to 87 Years

Healthy volunteers

Yes

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

Design outcomes

Primary

Measure	Time frame	Description
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.

Countries

South Korea

Outcome results