Clinical Publications

TRITON

Agreement Between Three Optical Coherence Tomography Devices to Assess the Insertion Distance and Thickness of Horizontal Rectus Muscles

AUTHORS:

De-Pablo-Gómez-de-Liaño L, Fernández-Vigo JI, Ventura-Abreu N, García-Feijóo J, Fernández-Vigo JÁ, Gómez-de-Liaño R

PUBLICATION:

J Pediatr Ophthalmol Strabismus. 54(3):168–176, 2017. DOI: 10.3928/01913913-20161102-04

Study Purpose

To assess the agreement between two different spectral domain (SD-OCT) and one swept source (SS-OCT) optical coherence tomography device to measure the insertion distance and the thickness of the horizontal rectus muscles

Overview

Study Design

Prospective cross-sectional observational study.

# of Eyes/
Patients

• 70 from 35 healthy hospital staff members, mean age 31.7+ 8.7 years (range: 22 to 61 years) 63% female, all Caucasian

Study Device

DRI OCT Triton™ SS-OCT (Topcon, Tokyo, Japan)
Spectralis® SD-OCT (Heidelberg Engineering Inc., Heidelberg, Germany)
Cirrus® 5000 SD-OCT (Carl Zeiss Meditec, Dublin, CA)

Outcome Measures

• Mean and standard deviation muscle thickness. • Muscle thickness at 8.5 and 10.5mm from the limbus for the lateral rectus muscle and 7.2 and 9.2mm from the limbus for the medial rectus muscle.

Results

There were no significant differences observed in the mean distances for the lateral and medial rectus muscles among the three devices. Additionally, there were no differences in the mean thickness of the lateral and medial rectus muscles among the three devices, with the best agreement observed between the Triton and Spectralis devices (Tables 1 and 2)

IMOvifa reduced measurement time by

39%

Conclusions

• This study represents a direct comparison between two SD-OCT devices and one SS-OCT device; the results suggest that OCT is an effective, reproducible technique to measure insertion distance and thickness of the horizontal rectus muscles using a device readily available in daily practice. • The authors supposed that even if the agreement is high between the devices in the insertion distance and moderate to good for the muscle thickness, it may not be high enough to consider an interchangeability of the measurements.