Your mother should definitely see her local optometrist to evaluate her eyes for any diseases or complications from the surgery. She could also reach out to her surgeon to see if there were any problems as a result.
I would go back to the surgeon that did the procedure for a follow up to address her concerns. They may be able to do some enhancements, but before then, also to evaluate and give reasons as to why the vision may not be as clear as she hoped. There could be multiple reasons, but the surgeon should be able to give some answers.
Dr. C Li, OD
Dr. David Johnson