13th August 2020

A 57-year-old gentleman with a background of ankylosing spondylitis presents to the emergency department (ED) with a red eye

A 57-year-old gentleman with a background of ankylosing spondylitis presents to the emergency department (ED) with a red eye. He complains of blurred vision and pain in the right eye, which have worsened throughout the day. You notice that he is shielding his eye with his hand and will not look up. The patient relaxes when you switch the light off. You refer the patient to the emergency eye clinic. There, a slit-lamp examination reveals a small and irregular pupil with leucocytes in the anterior chamber. What is the most likely diagnosis? 

For the patient above, please select the most appropriate diagnosis. Select ONE option from the list above.