When my husband closes his eyes he sees vivid images such as two females boxing, he's not asleep. this only happens when he closes his eyes. why?

Neurologist: I'm not sure whether this falls under the category of visual hallucinations. Does he have any other symptoms involving the visual or auditory systems,confusion or blank episodes? I recommend a consultation with a neurologist for evaluation and advice. Appropriate tests will be ordered and, if advisable, referrals to other specialists can be made.