Normal Tension Glaucoma: Vision Loss Without High Eye Pressure
Learn the symptoms and risk factors of normal tension glaucoma for early vision protection.
20
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Hospitals
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20
Years
180+
Hospitals
700+
Eye Specialists
3
Crore+ Eyes
What is Normal Tension Glaucoma?
Normal tension glaucoma is a form of open-angle glaucoma in which:
Eye pressure remains within normal limits (usually 10–21 mmHg)
Optic nerve damage still occurs
Vision loss progresses धीरे-धीरे
It challenges the common belief that glaucoma only happens due to high eye pressure.
Normal Tension Glaucoma – Causes, Symptoms & Treatment
Why is NTG Dangerous?
No early warning signs
Optic nerve damage occurs silently
Vision loss is permanent
Often diagnosed in advanced stages
It is often called the “silent thief of sight” because symptoms appear late.
Symptoms of Normal Tension Glaucoma
Early Stage:
No noticeable symptoms
Advanced Stage:
Loss of peripheral (side) vision
Blind spots in vision
Tunnel vision in severe cases
Most patients do not realize the problem until significant damage has already occurred.
Causes of Normal Tension Glaucoma
The exact cause is not fully understood, but several factors may contribute:
Common Causes:
Reduced blood flow to the optic nerve
Optic nerve sensitivity or weakness
Low blood pressure (especially at night)
Vascular disorders (poor circulation)
In many cases, insufficient blood supply damages optic nerve cells even without high pressure.
Risk Factors
You are at higher risk if you:
Have a family history of glaucoma
Have low blood pressure
Suffer from migraines
Have cardiovascular disease
Are above 40 years of age
Certain populations may also have a higher risk due to vascular factors.
Difference: Normal Tension vs Open-Angle Glaucoma
| Feature | Normal Tension Glaucoma | Open-Angle Glaucoma |
|---|---|---|
| Eye Pressure | Normal | High |
| Cause | Blood flow / nerve sensitivity | Fluid drainage issue |
| Progression | Slow | Slow |
| Detection | Difficult | Easier |
When Should You See a Doctor?
Consult an eye specialist if you experience:
Gradual vision loss
Blind spots in vision
Family history of glaucoma
Frequent headaches or vascular issues
Regular eye exams are critical for early detection
Diagnosis of Normal Tension Glaucoma
Diagnosis includes a comprehensive eye evaluation:
Tonometry – Measures eye pressure
Ophthalmoscopy – Examines optic nerve
Visual Field Test – Detects vision loss
OCT Scan – Measures optic nerve damage
Doctors may also evaluate blood circulation and systemic health conditions.
Treatment Options for NTG
Although NTG occurs with normal pressure, treatment still focuses on reducing eye pressure further to slow disease progression.
Medications
Eye drops to reduce pressure
Laser Treatment
Improves fluid drainage
Surgery
Used in advanced cases
Goal: Protect optic nerve and prevent further damage
Normal Tension Glaucoma Treatment Cost in India
Estimated Cost Range:
Eye drops: ₹500 – ₹2,000/month
Laser treatment: ₹10,000 – ₹30,000
Surgery: ₹40,000 – ₹1,50,000
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Recovery & Long-Term Management
Lifelong monitoring required
Regular eye check-ups essential
Vision loss cannot be reversed
Early treatment slows progression
Why Choose ASG Eye Hospital?
Advanced glaucoma diagnostics (OCT, visual field testing)
Experienced glaucoma specialists
Latest laser & surgical technologies
180+ hospitals across India
Personalized treatment plans
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Clear Answers for Better Vision
What is normal tension glaucoma?
It is a type of glaucoma where optic nerve damage occurs despite normal eye pressure.
Can NTG cause blindness?
Yes, if untreated, it can lead to permanent vision loss.
Why does NTG occur without high pressure?
It may be due to poor blood flow or optic nerve sensitivity.
Is NTG curable?
No, but it can be controlled with early treatment.
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