Experts found during the test that although students who lack vision can answer difficult questions, they cannot remember simple words. At the same time, lack of sleep may cause irreversible damage to children's learning and memory. Studies have found that when sleep is inadequate, some functional areas of the brain appear. Different levels of inhibition, which makes students often make mistakes when doing some simple learning. When faced with difficulties, because of additional activation and memory, attention to the closely related prefrontal cortex area to compensate for missing functions, students answer correctly The rate and response time were not significantly affected. Experts believe that although there is not enough evidence that lack of sleep will directly affect IQ, the existing evidence can prove that the attention and memory of students with impaired vision are indeed affected. The root cause of the difference in answering difficult questions and simple questions for children who are deaf is:. ['Different answering strategies.', 'Different parts of the brain are used.', 'Insufficient sleep inhibits some functional areas of the brain.', 'The prefrontal cortex area is more active than answering simple questions when answering questions.']