Atonic Pupil

Atonic Pupil 

Clinical features:

  • Symptoms: glare.
  • Signs: enlarged, irregular, poorly reactive pupil.
  • May occur following pupil stretching or sphincterotomies during cataract surgery for a small, non-dilated pupil.
  • Commonly seen in patients on long-term miotic drops.


  • Treatment of symptoms to reduce glare with sunglasses, shades or tinted contact lens.

  • Pilocarpine may be useful to regularize the pupillary border.