This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General anaesthesia, Subject name: Anaesthesia
Intraocular pressure is increased by which anesthetic 
Select and explain. 
A. Ketamine, B. O2, C. N20, D. Isoflurane
A: Ketamine
Answer: A: Ketamine 
Explanation: Ketamine may be contraindicated in patients with an open eye injury or other ophthalmologic disorder, in which a ketamine-induced increase in intraocular pressure would be detrimental. ketamine increases all the pressures - blood pressure intracranial pressure intragastric pressure intraocular pressure Ref: Miller's anesthesia 8th edition.