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Evaluation of visual function within the central 10 degrees using IMOvifa™ 24plus (1-2)
Yuki Takagi1,2, Ryo Asano1,3, Kana Yamashita2
1Chukyo Hospital 1-10, Nagoya, Aichi, Japan.
Plos One
|May 12, 2025
Summary
The IMOvifa™ perimeter shows strong correlation with the HFA 10-2 for visual field testing. While it may detect more residual visual function, it cannot replace the HFA 10-2 for central 10-degree evaluations.
Area of Science:
- Ophthalmology
- Visual Field Testing
- Medical Devices
Background:
- The central 10 degrees of the visual field are crucial for detailed assessment.
- The IMOvifa™ perimeter offers additional measurement points in this critical area.
- Comparative evaluation with existing perimetry methods is needed.
Purpose of the Study:
- To comparatively evaluate the IMOvifa™ 24plus (1-2) perimeter against the Humphrey Field Analyzer (HFA) 10-2.
- To assess the IMOvifa™ perimeter's ability to evaluate the central 10-degree visual field.
- To determine the concordance between IMOvifa™ 24plus (1-2) and HFA 10-2 for visual field defects.
Main Methods:
- 30 patients (48 eyes) underwent testing with IMOvifa™ 24plus (1-2), HFA 24-2, and HFA 10-2.
- Spearman's rank correlation was used for Mean Deviation (MD) and Pattern Standard Deviation (PSD).
- Kappa analysis evaluated concordance of visual field defects and residual visual field detection.
Main Results:
- IMOvifa™ 24plus (1-2) and HFA 24-2 showed strong correlation with HFA 10-2 for MD and PSD.
- Agreement with HFA 10-2 for detecting central 10-degree defects was substantial for both IMOvifa™ 24plus (1-2) (κ=0.715) and HFA 24-2 (κ=0.754).
- IMOvifa™ 24plus (1-2) detected residual visual function in 100% of cases where HFA 10-2 indicated it.
Conclusions:
- The IMOvifa™ 24plus (1-2) demonstrates potential for enhanced defect detection in specific visual field areas.
- It may also be effective in identifying residual visual function.
- However, the HFA 10-2 remains essential for comprehensive evaluation of the central 10-degree visual field.
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