![]() Prevention is the key, particularly when it comes to glaucoma. A prism lens can sometimes be added to your glasses for certain kinds of PVL, but otherwise, there’s no correction that can be applied. ![]() But if PVL is caused by other eye conditions, such as glaucoma or retinitis pigmentosa, it is permanent. If your PVL is caused by migraine, then it’s usually temporary. Some people with PVL experience bumping into things, tripping, or falling. Navigating while walking or orienting yourself can become difficult. You may have trouble seeing in low light or at night. The outer angles of your vision may seem distorted initially, and over time, you aren’t able to see anything on the periphery of your visual field. The most common experience with PVL is that your central vision is just fine, but you have difficulty seeing from the side. Scotoma (blind spots in your visual field).Retinitis pigmentosa (a rare inherited disease in which the retina degenerates over time).A stroke or brain injury affecting the image-processing parts of the brain.Occlusions (the closing of blood vessels that block normal blood flow to the eye).It can affect your life in all kinds of ways, from sports to driving and even daily mobility. You might have tunnel vision come on suddenly or it may be more gradual. You can see well when staring straight ahead, but it seems as though you’re looking at things through a narrow tube. Tunnel vision, also called peripheral vision loss or PVL, is when you have a loss of your side vision. But this wide angle of sight can be compromised by a variety of medical conditions and eye diseases. When our vision is normal, we see from multiple angles: the front and the sides.
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