11/24/2023 0 Comments Polycoria double pupil eye![]() This means the pupil will still constrict in bright conditions and dilate in dark conditions. In the case of tadpole pupil, doctors believe that only a portion of the cells spasm, which causes a peak in one section of the pupil.Įxperts who have observed tadpole pupil report that the pupillary light response still works during a spasm. To dilate evenly, all of the cells in the circle must work together. When the cells contract, it allows the pupil to dilate ( mydriasis). These cells take orders from the sympathetic nervous system - the same system that gives us our “fight or flight” response. The iris dilator muscle is a ring of cells in the iris that are arranged around the pupil, like the spokes of a wheel. It’s believed that the immediate cause of pupil distortion is a spasm in the iris dilator muscle. Tadpole pupil causesĮxperts are still researching the exact cause of tadpole pupil. However, frequent episodes may be a precursor for conditions such as Horner’s Syndrome or Adie Tonic Pupil, and should be examined by an eye doctor. While experiencing tadpole pupil can be unsettling, there is usually no need for alarm. It usually affects one eye only, though it’s possible for both eyes to be affected. It’s possible for episodes of tadpole pupil to be isolated, meaning it only happens once, or it may reoccur intermittently over a period of days or weeks. The appearance of tadpole pupil usually only lasts a few minutes and resolves on its own. This results in an irregular pupil shape that resembles a tadpole. Tadpole pupil is a rare occurrence in which the pupil is dilated unevenly.
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