Peripheral vision problems mean that you don't have a normal, wide-angle field of vision, even though your central vision may be fine. Moderate and severe cases of peripheral vision loss create the sensation of seeing through a narrow tube, a condition commonly referred to as "tunnel vision. Symptoms of peripheral vision loss also can include difficulty seeing in dim light and decreased ability to navigate while you are walking. A common cause of loss of peripheral vision also called a peripheral field defect is optic nerve damage from glaucoma. Eye "strokes" occlusions that block normal blood flow to the eye's internal structures, including the optic nerve, also can lead to loss of peripheral vision. A stroke or injury also may damage portions of the brain where images are processed, leading to blind spots in the visual field. Retinitis pigmentosa. Detached retina. Neurological damage such as from optic neuritis.
OTHER WORDS FROM tunnel vision
Literally, tunnel vision is a term meaning that the edges of your vision are lost and only central focus remains, as if you were looking through a tunnel. Figuratively , it is a lack of perspective caused by intense focus on one object, leading to neglect of your surroundings and responsibilities or being closed off to other viewpoints. Tunnel vision emerges in the mids as a popular term for when automobile drivers lost vision out of the sides of their eyes their peripheral vision. Besides taxing the eyes when being too long on the road, a variety of other things can cause tunnel vision , including retinal injury, drugs and alcohol, emotional stress and panic attacks, and oxygen deprivation. This can be both a strength and weakness.
Peripheral vision is also known as side vision — the ability to see objects or people to the side or above and below as a person looks straight ahead. People with normal peripheral vision have a lateral field of view that creates an almost degree angle and vertical field of view of about degrees. People or objects directly to the right or left in the distance are still visible. If someone has or develops peripheral vision problems, their field of vision is reduced. They no longer have a normal, wide-angle field of vision. A person can have peripheral vision problems even if they have excellent central, or straight-ahead, vision. Another term for a loss of peripheral vision is a peripheral field defect. Moderate and severe cases of side vision problems can lead to extreme peripheral vision loss , or tunnel vision. Table of Contents Tunnel Vision Glaucoma Retinitis Pigmentosa Stress Other Causes Preventing Tunnel Vision Moderate and severe cases of side vision problems can lead to peripheral vision loss, creating the sensation of looking through a narrow tube. This is called tunnel vision.
Tunnel vision is the loss of peripheral vision with retention of central vision, resulting in a constricted circular tunnel -like field of vision. Eyeglass users experience tunnel vision to varying degrees due to the corrective lens only providing a small area of proper focus, with the rest of the field of view beyond the lenses being unfocused and blurry. Where a naturally sighted person only needs to move their eyes to see an object far to the side or far down, the eyeglass wearer may need to move their whole head to point the eyeglasses towards the target object. The eyeglass frame also blocks the view of the world with a thin opaque boundary separating the lens area from the rest of the field of view. The eyeglass frame is capable of obscuring small objects and details in the peripheral field. Activities which require a protective mask, safety goggles, or fully enclosing protective helmet can also result in an experience approximating tunnel vision. Underwater diving masks using a single flat transparent lens usually have the lens surface several centimeters from the eyes. The lens is typically enclosed with an opaque black rubber sealing shell to keep out water. For this type of mask the peripheral field of the diver is extremely limited.