Normal-Tension Glaucoma Treatment
Even though eye pressure starts in the statistically normal range, lowering it further remains the cornerstone of treatment — alongside attention to blood flow and vascular risk factors.
The Core Principle: Lower Pressure Further, From Any Starting Point
The Collaborative Normal-Tension Glaucoma Study, a landmark randomized trial, found that reducing eye pressure by roughly 30% from baseline — even when that baseline was already in the statistically normal range — significantly reduced the rate of further optic nerve damage compared to no treatment.1 This finding is the foundation of normal-tension glaucoma treatment: the same pressure-lowering toolkit used in open-angle glaucoma is used here, just with the recognition that even a normal number can still be too high for a particular optic nerve.
The Same Treatment Ladder as Open-Angle Glaucoma
Eye drops (often started with a prostaglandin analog), SLT laser, MIGS surgery, and traditional filtering or tube shunt surgery are all used in normal-tension glaucoma using the same general stepwise approach as open-angle glaucoma. See our Open-Angle Glaucoma Treatment page for the general ladder, and our individual Eye Drops, SLT Laser, MIGS Surgery, Trabeculectomy, and Tube Shunt Surgery pages for details on each option.
Addressing Vascular & Blood Flow Factors
Because impaired blood flow to the optic nerve is thought to play a larger role in normal-tension glaucoma than in typical open-angle glaucoma, we also pay close attention to systemic vascular factors: the timing of blood pressure medications (to avoid excessive nighttime blood pressure dipping), screening for sleep apnea when suspected, and discussing migraine and Raynaud phenomenon history, all of which have been associated with this condition.
Learn more about the condition itself, including its diagnosis and the reasoning behind an MRI when needed, on our Normal-Tension Glaucoma page.
References
- Collaborative Normal-Tension Glaucoma Study Group. Comparison of glaucomatous progression between untreated patients with normal-tension glaucoma and patients with therapeutically reduced intraocular pressures. Am J Ophthalmol. 1998;126(4):487-497.
Frequently Asked Questions
If my pressure is normal, why lower it further?
The Collaborative Normal-Tension Glaucoma Study found that lowering eye pressure by about 30% from baseline, even starting from a normal reading, significantly slowed disease progression in most patients.
Do I need the same treatments as open-angle glaucoma?
Largely yes — the same drops, SLT laser, MIGS, and traditional surgery options apply, since the treatment goal (lowering pressure further) is the same, even though the starting pressure differs.
Will you look at my blood pressure medications?
Yes. We ask about blood pressure medication timing, since nocturnal blood pressure dipping too low has been associated with normal-tension glaucoma progression, and we coordinate with your primary care doctor if a change seems worth discussing.
Will I need a brain MRI?
Sometimes, particularly if the pattern of optic nerve damage is atypical, to rule out a compressive cause that can mimic normal-tension glaucoma.
See a glaucoma specialist. Dr. Robert Gunzenhauser is Harvard-educated and UCLA fellowship-trained in glaucoma, providing expert diagnosis and treatment for Normal-Tension Glaucoma Treatment at Inland Glaucoma Center in Upland, CA.