Perimetric Comparison Between the IMOvifa and Humphrey Field Analyzer

Area of Science:

• Ophthalmology
• Medical Technology

Background:

• The Humphrey Field Analyzer (HFA) is a standard for automated perimetry.
• Faster visual field (VF) testing methods are needed to improve patient comfort and clinic efficiency.

Purpose of the Study:

• To evaluate the performance of the IMO visual function analyzer (IMOvifa) for binocular visual field testing.
• To compare IMOvifa's results against standard automated perimetry (HFA).

Main Methods:

• A cross-sectional study evaluated 138 eyes using both HFA 24-2 SITA-Fast and IMOvifa 24-2 AIZE-Rapid.
• Key metrics including Mean Deviation (MD), Pattern Standard Deviation (PSD), foveal threshold, and Visual Field Index (VFI) were compared.
• Measurement time was recorded for each device.

Main Results:

• IMOvifa testing was significantly faster (256s vs. 419s, P <0.001), reducing measurement time by 39%.
• No significant differences were found in MD and VFI between the devices (P >0.05).
• Strong correlations were observed for MD (r=0.90), PSD (r=0.78), and VFI (r=0.94).

Conclusions:

• IMOvifa offers a faster alternative to HFA for visual field testing with comparable results for MD and VFI.
• The reduced testing time may decrease patient and examiner fatigue.
• Further research is recommended to assess IMOvifa's utility in routine clinical practice.