There may be other causes of enlargement of one pupil. This list is not all inclusive, and the causes are not presented in order of likelihood. The causes of this symptom can include unlikely diseases and medications. Furthermore, the causes may vary based on age and gender of the affected person, as well as on the specific characteristics of the symptom such as time course, aggravating factors, relieving factors, and associated complaints. Use the Symptom Analysis option to explore the possible explanations for enlargement of one pupil, occurring alone or in combination with other problems.
Treatment depends on the cause of the enlargement of one pupil.
For pupil size inequality caused by a head injury , get immediate medical help. For pupil size inequality caused by a tumor , follow prescribed therapy. Stay active as strength allows. Work and exercise moderately. Rest when tired.