Answer to Question #337822 in Human Anatomy and Physiology for Ken

Question #337822

How can Roger avoid running into a person if he is blind

Expert's answer

Roger's condition is known as diabetic retinopathy. In this disorder, diabetes causes small hemorrhages in retinal blood vessels that disrupt the oxygen supply to the photoreceptors. Due to the damage in the blood vessel that disrupted the oxygen supply new abnormal vessels have blocked Roger’s vision. These abnormal vessels also could affect the retina by allowing it to detach, which is the reason why Roger’s is now legally blind.

Even though, Roger is not able to see while crossing the street since he is blind. Roger has other senses that have become sharper due to his condition. His hearing sense allowed him to hear that another person was close enough for him to bump or hit the person. This is why Roger was able to jump back without seeing the other person. Most blind people have an amazing ability to touch, smell or hear with a high degree of acuity.

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