HFA MD to VFI Converter

Perimetric Analysis • MD to VFI Conversion

Mean Deviation (MD) from Printout

dB

Clinical Note: While highly correlated (r=0.94), VFI is less sensitive to media opacities (cataracts) than MD. This tool uses the established linear regression for HFA 24-2/30-2 analysis.

Awaiting HFA Data

Guidelines & Evidence

Verified

Last Review: 2026

When to Use

Clinical Utility

Data Normalization: Converting historical or referral records that only document Mean Deviation (MD).

Patient Communication: Translating logarithmic decibel (dB) loss into an intuitive functional percentage (%).

Longitudinal Tracking: Estimating the Visual Field Index (VFI) to determine the rate of progression in chronic glaucoma.

Research Data Cleaning: Standardizing visual field metrics across heterogeneous clinical datasets.

Last Comprehensive Review: 2026

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