Measurement Repeatability in Contemporary Aberrometry

Status Not yet recruiting

Clinical Trial Summary

Wavefront scans are a common form of diagnostic test applied in preparing patients for laser eye surgery. An optical map of the eye is created by wavefront scanning, and information from these maps is used to program lasers used to correct focusing errors in the eye. Here the investigators are comparing how repeatable measurements are with a new wavefront scanner and one that is already in widespread use.

Clinical Trial Description

Aberrometers are used to measure each element of defocus (aberration) in an optical system. In LASIK, information derived from aberrometry (scans performed using aberrometers) is used to program the pattern of laser pulses delivered by an excimer laser in therapeutic reshaping of the cornea to correct defocus. To do this accurately, aberrometry findings need to be repeatable and correspond closely to manifest refraction. Here the investigators compare repeatability of measurements for a new aberrometer (Peramis) versus the aberrometer most widely used in contemporary wavefront guided laser vision correction (iDesign).

The test aberrometer will be:

Peramis (Schwind Eye-tech Solutions, Kleinostheim, Germany).

Control aberrometer will be:

iDesign (AMO, Santa Clara, CA) ;

Study Design

Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Single Blind (Investigator), Primary Purpose: Diagnostic

Related Conditions & MeSH terms

Refractive Errors

Clinical Trial Details

NCT number	NCT02687022
Study type	Interventional
Source	Moorfields Eye Hospital NHS Foundation Trust
Contact	Angelique Thomas
Phone	02075662156
Email	angelique.thomas@moorfields.nhs.uk
Status	Not yet recruiting
Phase	N/A
Start date	March 2016
Completion date	September 2016

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