Judith is a 79 year old woman who has a 1 day history of a severe headache and a painful ache around her left eye. She has a history of Depression and has been stable on Sertraline for the last 6 months. The vision in her left eye is blurry and her eye looks red. On examination there is ciliary flush and a hazy cornea.
Based on the likely diagnosis, what is the best management option at this stage?