Steven was born with cataracts.As a child,his vision was so bad that he was considered legally blind.As an adult,he had a surgical procedure to remove the cataracts.However,the physicians have explained to Steven that he will never achieve normal vision.This demonstrates
A) the maturation of vision.
B) the process of visual development.
C) how cognition is related to visual perception.
D) a critical period for vision.

Question

Quizplus · Accepted Answer

The fact that Steven was born with cataracts and his vision was so bad as a child suggests a critical period for vision development, during which his visual system did not receive sufficient input to develop normally. Although the surgical procedure allowed for some improvement, the fact that he will never achieve normal vision indicates that this critical period has passed and his visual system is permanently altered.

Steven Was Born with Cataracts