Does encephalopathy affect intelligence?

Patient's question:

My boyfriend took a bath in the toilet yesterday and didn't come out for three hours. Later, I knocked the door open and discovered that he had carbon monoxide poisoning inside. He is currently unconscious. I want to ask if sudden health problems caused by carbon monoxide poisoning can affect vision?

Doctor's answer:

Sudden problems are very rare in clinical diagnosis. The current possibility of carbon monoxide poisoning mainly includes the following aspects:
1. The respiratory system.
2. The nervous system. It primarily involves changes in the lips, leading to choking, which can then result in cerebral palsy.
The second aspect is the impact on cardiopulmonary function, such as coughing, chest tightness, and shortness of breath.
The third aspect is vision, where it can suddenly cause visual impairment, and there is also the possibility of retinal detachment.

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