system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
Poisoning with all the following causes constriction of the pupils except -
assistant
The correct answer is  Morphine, organophosphates and pontine hemorrhage cause miosis (constriction of pupil).
Dhatura causes mydriasis (dilatation of pupil).