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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.
Retinitis Pigmentosa
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. In combat, for instance, tunnel vision may help a soldier zoom in on their target or mission, but it also exposes them to attacks on their blind spots. In contemporary culture, tunnel vision is frequently used as a criticism against people or organizations who lose sight of the big picture. This could be a student, whose tunnel vision on getting straight As could lead to neglect of other relationships.
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.
