Miosis is typically diagnosed through a physical examination of the eyes. In cases of suspected poisoning, the presence of miosis may prompt further diagnostic testing to identify the specific toxin involved. Management of miosis involves treating the underlying cause, such as administering naloxone for opioid overdose or atropine for organophosphate poisoning. Symptomatic relief, such as reducing environmental light exposure, may also be provided to alleviate discomfort.