A patient presents with sudden-onset, severe eye pain, headache, nausea, and vomiting. On examination, the affected eye appears red, with a steamy cornea and mid-dilated, non-reactive pupil. Which of the following conditions is most likely responsible for this presentation?
Correct Answer: A
Rationale: The presentation described is characteristic of acute angle-closure glaucoma. This condition typically presents with sudden-onset severe eye pain, headache, nausea, and vomiting. On examination, the affected eye may appear red due to conjunctival injection, and there may be a steamy cornea due to corneal edema. The mid-dilated, non-reactive pupil is a key finding in angle-closure glaucoma, as the iris bombe (forward movement of the peripheral iris) blocks the drainage angle, leading to increased intraocular pressure. If left untreated, acute angle-closure glaucoma can result in irreversible vision loss. Immediate intervention is crucial to lower the intraocular pressure and prevent further damage to the optic nerve. Prompt referral to an ophthalmologist for definitive treatment is necessary in cases of suspected acute angle-closure glaucoma.