6.Deaf Vision
Individuals born deaf tend to have peripheral vision that is more sensitive to movement and light. The explanation could be a brain adaptation. Whenever a person looks at something, two pathways in the brain process the information. One assesses the object’s position and motion while the other is all about recognition.
During motion-tracking experiments, the first pathway showed enhanced activity in the deaf and most likely is the reason why peripheral sight is stronger in them. Another experiment suggests the deaf can also use their sense of touch to develop visual acuity. Two study groups received a flash near the corner of the eye. During this, the hearing participants received two beeps, and the deaf got two puffs of air to the face. Both reported the same hallucination of seeing two flashes. In deaf cats, the hearing part of their brain also appears to sharpen their peripheral vision.
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