What is Normal-Tension Glaucoma (NTG)? - Glaucoma Glossary

Normal-Tension Glaucoma is a variant of open-angle glaucoma where optic nerve damage and vision loss occur despite intraocular pressures being consistently within the statistically "normal" range (10-21 mmHg).

What it means for the patient

Even though your eye pressure numbers look completely normal, your optic nerve is still getting damaged. This often means your specific optic nerve is unusually sensitive, or you have issues with blood flow to the nerve.

Clinical significance

NTG management frequently requires achieving target IOPs 30% below baseline, operating at the extreme low end of the physiological pressure spectrum. Comorbidities like sleep apnea, migraines, and vasospasm are strong clinical correlations.

How it is tracked

Carefully mapped by establishing extremely low target IOP lines and aggressively monitoring for unhalted VFI deterioration on the Glaucoma One timeline.