What RNFL thickness is abnormal?

Global RNFL <80 microns is outside normal limits. Superior and inferior sector RNFL <100 microns may indicate loss in glaucoma-susceptible areas. Yellow (borderline) and red (outside normal limits) color coding on Cirrus/Spectralis OCT flags abnormalities.

What RNFL progression rate is clinically significant?

RNFL loss >1 micron/year (global average) is significant. Superior/inferior sector rates >2 microns/year warrant treatment intensification. Loss >=4 microns over 2 years typically triggers management change.

When does RNFL loss precede visual field loss in glaucoma?

RNFL loss on OCT precedes detectable VF loss on SAP by 2-6 years. OCT is more sensitive for detecting early glaucoma; VF is better for tracking functional impact in moderate-advanced disease.

RNFL Thinning Pattern Progression Rate

Assess retinal nerve fiber layer (RNFL) thinning rate and pattern on OCT. Global RNFL <80 microns or superior/inferior sector loss indicates glaucomatous damage. Rate >1 micron/year is significant.

Use the full interactive calculator below, or

RNFL Thinning Pattern Progression Rate

Frequently Asked Questions

What RNFL thickness is abnormal?

What RNFL progression rate is clinically significant?

When does RNFL loss precede visual field loss in glaucoma?