Traumatic Miosis Can Exist

During examination of the patient, pupil was just 5 mm on dilatation. I thought it is part of the senile miosis for this patient aga 60 years old. But this situation was weird because the other eye well properly dilated. So, I planned to use iris retractors during the surgery and all the setting for ant traumatic cataract. 

During surgery all the situation was weird from dilatation of the pupil that I recognized that the iris tissue doesn’t want to get dilated easily. The phacoemulsification went perfect and smoothly, but during wound hydration, the whole complex bag and IOL get moved in a weird way to capture in the pupil. I decided to inject air which make the whole complex back again in so stable way. Second day post operative everything was stable and pupil was well closed and regular with no errors of refraction and vision is 20/20. One month later I decided to do UMB for this eye to see what was the problem. UMB revealed that IOL is well center, the periphery of the posterior chamber is so deep than the usual measurements instead it is a normal axial length eye globe. At this point I discovered that it was traumatic miosis with laxity of the iris periphery due to trauma to the dilator pupillae muscle.