EyeFixer

Calculate D
Optic Nerve Imaging

Disc Area Calculator

Estimate optic disc area from ring and disc diameter measurements on the Heidelberg Spectralis OCT optic nerve report.

Estimated Disc Area

D = π × (3.0625 × B × C) / A²
mm
mm
mm
Estimated Disc Area
—mm²
For clinical reference only. Estimates should be interpreted alongside the full OCT optic nerve report and clinical examination.

Test Procedure

  1. Obtain the Heidelberg Spectralis optic nerve report. The report must show an image of the optic nerve head and the superimposed peripapillary ring where peripapillary segmentation was performed.
  2. Measure ring diameter
  3. Measure horizontal optic nerve diameter
  4. Measure vertical optic nerve diameter