Author: Abiya Amna Ahmed, Shaan Rashid / Editor: Yasmin Sultan / Codes: OptP3, OptP4, SLO1, SLO2Published: 07/12/2022

A 39-year-old male patient attends the emergency department (ED) with sudden onset pain and redness of his left eye.

On examination he is photophobic. His left pupil appears irregular in size.

He is known to have a condition characterised by back pain and stiffness.