Final answer:
In acute angle closure glaucoma, the pupil is often mid-dilated and may not respond well to light due to increased intraocular pressure, leading to a red appearance and potential corneal haziness.
Step-by-step explanation:
In acute angle closure glaucoma, the appearance of the pupil may be notably different from its state under normal conditions. Typically, the pupil in this condition would appear mid-dilated and may be non-responsive or poorly responsive to light due to increased intraocular pressure. The eye might also appear red, and the cornea can become hazy due to corneal edema resulting from the elevated pressure within the eye. It is important to note that acute angle closure glaucoma is a medical emergency, and if left untreated, it can lead to permanent vision loss. Detection and treatment often involve the use of medications to lower intraocular pressure, and sometimes immediate surgery is required to prevent optic nerve damage.