Hi, I can understand your concern regarding your daughter s symptoms. I would have liked to know if she is on any treatment for selective mutism. The current set of symptoms of not being able to see for some time, even though her eye examination coming out to be normal might be due to another anxiety related disorder termed dissociative sensory loss. You should consult a psychiatrist for complete evaluation of her condition. One of the possible reasons is that she is facing some kind of stress at present and not expressing it to anyone. It might take some time to take her into confidence and make her express her difficulties. In addition, treatment with medications like escitalopram will help her control her anxiety and reduce stress. I do hope that I was able to answer your query. Wishing your daughter a speedy recovery.