Clinical Publications

TEMPO

Repeatability of Visual Fields Taken with the IMOvifa™ Perimeter

AUTHORS:

Tafreshi M; Menou J; Kasanoff D; Durbin M; El-Nimri NW; Cieslinski K

PUBLICATION:

Presented at the Association for Research in Vision and Ophthalmology meeting, 2023

Study Purpose

To evaluate the repeatability of two test strategies offered for the IMOvifa perimeter in healthy eyes and glaucomatous eyes

Overview

Study Design

Repeatability study

# of Eyes/
Patients

20 patients (11 healthy and 9 glaucoma)

Study Device

IMO Smart Visual Function Analyzer (IMOvifa)*

Outcome Measures

Primary: Mean deviation (MD), pattern standard deviation (PSD), and their repeatability standard deviations. Secondary: test times

Results

Repeatability standard deviation was 1.2 dB for the MD for glaucoma eyes, and 0.2 dB for normal eyes
Repeatability standard deviation was 0.31 dB for the PSD for glaucoma eyes, and 0.05 dB for normal eyes
The test time ranged from 1.8 to 3.4 minutes for normal eyes while it varied from 2.0 to 6.9 minutes for glaucomatous eyes

IMOvifa reduced measurement time by

39%

FIGURE 1

Shows two AIZE-Rapid tests from an eye with early glaucoma. Adapted from Invest. Ophthalmol. Vis. Sci. 2023;64(8):5505.

Conclusions

IMOvifa’s binocular test allowed for rapid testing while providing acceptable repeatability for clinical use. As expected with visual field testing, repeatability was worse in eyes with glaucoma.