Hfa md to vfi converter Score — Free Online ophthalmology Calculator

Perimetric Analysis • MD to VFI Conversion

Mean Deviation (MD) from Printout

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: 2026-07-17

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.

How it Works

MD vs. VFI: The Core Difference

Metric	Scale	Sensitivity
Mean Deviation (MD)	Decibels (dB)	High sensitivity to cataracts and media opacities.
Visual Field Index (VFI)	Percentage (%)	Designed to be resistant to cataracts; focuses on neural loss.

Linear Regression Formula

VFI ≈ 100 + (3.4 × MD) Applicable Range: 0 dB to -20 dB

Last Comprehensive Review: 2026-07-17

Perimetric Analysis • MD to VFI Conversion

Mean Deviation (MD) from Printout

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: 2026-07-17

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.

How it Works

MD vs. VFI: The Core Difference

Metric	Scale	Sensitivity
Mean Deviation (MD)	Decibels (dB)	High sensitivity to cataracts and media opacities.
Visual Field Index (VFI)	Percentage (%)	Designed to be resistant to cataracts; focuses on neural loss.

Linear Regression Formula

VFI ≈ 100 + (3.4 × MD) Applicable Range: 0 dB to -20 dB

Last Comprehensive Review: 2026-07-17

HFA MD to VFI Converter

When to Use

Clinical Utility

How it Works

MD vs. VFI: The Core Difference

Linear Regression Formula

Clinical Pearls

The Cataract Filter

The Evidence

Primary References

A visual field index (VFI) for calculation of glaucoma rate of progression

The visual field index (VFI): robustness to eye media opacities

Resources

Direct Access

In Recent Clinical News

HFA MD to VFI Converter

When to Use

Clinical Utility

How it Works

MD vs. VFI: The Core Difference

Linear Regression Formula

Clinical Pearls

The Cataract Filter

The Evidence

Primary References

A visual field index (VFI) for calculation of glaucoma rate of progression

The visual field index (VFI): robustness to eye media opacities

Resources

Direct Access

In Recent Clinical News