You are evaluating a patient in the ED for the onset of an acute, severe headache and you believe the diagnosis is an acute angle closure glaucoma. What is the significance in this scenario of finding a pupil that reacts to light?
On exam, AACG will usually present with a cornea that appears "steamy" or "hazy".
The pupil will be mid-dilated and nonreactive. If the pupil reacts, the diagnosis should be reconsidered.
(EMCNA, Vol. 26, pg. 35).