causes of tunnel vision
The Causes of Tunnel Vision. Tunnel vision can be caused by a host of medical and biological conditions ranging from blood loss, alcohol consumption through to mercury poisoning and a bite from a black mamba (a type of poisonous snake). The leading causes of the condition are listed below: Glaucoma. When a person suffers from glaucoma the condition causes pressure build up inside the eyeball. This fluid pressure puts a strain on the retina, distorting it or warping it out of shape and the result is loss of peripheral vision, or tunnel vision.