What MD values classify glaucoma severity?

Mild glaucoma: MD > -6 dB; moderate: MD -6 to -12 dB; severe: MD 1 dB/year require treatment escalation to prevent blindness.

How reliable is a single Humphrey visual field test MD?

Single test reliability is affected by learning effects, fatigue, fixation losses, and false positive/negative rates. At least three reliable baseline tests are needed before trend analysis can be performed.

Perimetry Mean Deviation — Visual Field Loss Classification

Interpret Humphrey visual field perimetry Mean Deviation (MD) to classify glaucoma severity and rate of progression using established Hodapp-Parrish-Anderson criteria and trend analysis.

Use the full interactive calculator below, or

Perimetry Mean Deviation — Visual Field Loss Classification

Frequently Asked Questions

What MD values classify glaucoma severity?

How reliable is a single Humphrey visual field test MD?