What is tunnel vision?

Loss of peripheral. In tunnel vision, the peripheral portions of the retina lose their sensitivity and only the central portion remains (a tunnel straight ahead). Most often found in inherited degenerations like retinitis pigmentosa, some drugs can do this as well as rare retiinal infections. Advanced tunnel vision is very handicapping as victims cannot see their feet, or objects in view.
Keyhole view. Constriction of the peripheral visual field is often due to end-stage glaucoma, hereditary rp, and viral infections of the outer retina. Field expansion with a fish-eye lens or reverse telescope are possible, but at the cost of reduced acuity. Orientation and mobility training is recommended, even if the central vision is serviceable. See a vision rehabilitation specialist.

Related Questions

What is tunnel vision and how bad is it?

Restricted field. Tunnel vision is when the vision outside the central axis is impaired or lost. It is typical for some inherited conditions and occurs in advanced diseases like glaucoma and diabetes. It is quite handicapping even if the central vision is fine and if less than about 10 degrees may require a seeing eye dog. Read more...

What causes tunnel vision and blurry areas?

Glaucoma. Glaucoma affects the peripheral vision and patients with a very advance glaucoma have what we call" tunnel vision". Glaucoma is a silent disease and without proper screening can advance and affect your vision. Comprehensive eye exams will help detect it. Read more...
Glaucoma or Retina . Problems in either the retina or glaucoma can both cause "tunnel vision and blurry areas". Another possibility is optic neuritis or perhaps uveitis. Other retinal disorders can also cause such symptoms. Read more...

What is tunnel vision and temporary blindness?

Tunnel vision. Tunnel vision (also known as kalnienk vision) is the loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel-like field of vision. Read more...

What can cause tunnel vision and lightheadedness every time I stand up?

Get medical help. These symptoms related to a change in position may be from an abrupt drop in blood pressure when standing. This can be medication related, or could be cardiac in nature. Sometimes increased intracranial pressure can cause symptoms like this. Read more...

What could nausea, tunnel vision, and fainting be signs of. Had an ekg, eeg, blood tests, tilt table, echo, neurologist and cardiologist visits.?

Vasovagal. Did you have a positive tilt table ? This can be vasovagal. It depends on your medications, work up. Read more...
Hyperventilation? Often the simplest explanations need to be considered. Dr. Azimi was also very wise to consider vasovagal reactions. In lieu of an ekg, a holter monitor might reveal a rhythm disturbance when you are not in the office and experience these problems. Read more...
Maybe panic attack. It seems that you have gone through quite a bit of ordeal, and i assume the results of those tests are all normal? If so, the symptoms you have maybe from panic attack which is quite common and very treatable. If your symptoms occur more often during period of rests or in some specific environment such as super market etc...Panic attack is more likely. Please follow-up with doc. Good luck. Read more...