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Miami, FL
A 25-year-old female asked:

What would cause the pupil to be constricted all of the time?

3 doctor answers6 doctors weighed in
Dr. David Duhon
Sleep Medicine 36 years experience
Causes of miosis: Pupillary constriction is called miosis. I presume it is just one pupil. There are multiple potential causes, some benign, and some indicating a dangerous condition. If the miosis is of recent onset, i advise a trip to the er. If it has been present for a while (months to years), you should see a neurologist or an opthalmologist. Don't ignore it.
Dr. Jay Bradley
Cornea, Cataract, & Refractive (LASIK & PRK) Surgery 19 years experience
Many things: Pupillary asymmetry needs evaluation. Many issues can make a pupil smaller or make the fellow pupil larger, resulting in asymmetry. See an eye doctor for further evaluation.
Dr. Jon Fishburn
Ophthalmology 31 years experience
Exam to know: An exam would be helpful in this case. There are several possibilities. Aide's tonic pupil ( dilated then constricted ), horner's syndrome, argyll-robertson, pharmacological, poisons, neurological, hereditary, to name a few.

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