Condition

Tunnel Vision

Also known as Peripheral Vision Loss, Side Vision Loss, Narrowed Vision, Constricted Visual Field, Loss of Side Sight

Updated May 19, 2026For educational purposes only. Not a substitute for medical advice. See our terms.

Bottom Line

Tunnel vision means side vision is missing or narrowed. Sudden tunnel vision needs urgent care, while gradual loss needs a full eye exam.

Tunnel vision means the center may look clear, but side vision is reduced. People may bump into objects, miss steps, or have trouble driving.

Gradual tunnel vision can come from glaucoma, retinitis pigmentosa, or other retina and nerve problems. Glaucoma pathophysiology and treatment focus on optic nerve damage and eye pressure 1.

Retinitis pigmentosa can affect light-sensing retina cells and narrow side vision over time 2.

Sudden side vision loss, a curtain or shadow, severe eye pain, or stroke signs need urgent care the same day.

Common Causes

Side vision loss can come from the eye, optic nerve, or brain.

  • Glaucoma can slowly damage the optic nerve and side vision 1.
  • Retinitis pigmentosa can cause night blindness and progressive side vision loss 2.
  • Retinal detachment can cause a new shadow or curtain.
  • Stroke or migraine can change the visual field suddenly.

How Doctors Test It

The main test is a visual field test. It maps what you can see straight ahead and to each side.

The doctor may also check eye pressure, the optic nerve, the retina, and pupil reactions. Sudden symptoms may need emergency brain or blood-flow testing.

Common Questions About Tunnel Vision

Yes. Glaucoma can damage side vision over time. Many people do not notice early loss without a visual field test 1.

Next Steps

  1. 1Call 911 for tunnel vision with face droop, slurred speech, confusion, or one-sided weakness.
  2. 2Get same-day retina or emergency eye care for a new curtain, shadow, or sudden side vision loss.
  3. 3Book a full eye exam for gradual side vision loss or night vision trouble.
  4. 4Ask for visual field testing and optic nerve imaging if glaucoma is possible.

Find specialists for Tunnel Vision

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