Orbital compartment syndrome is an uncommon complication of trauma to the eye and its surroundings or a rare complication to sinus surgery. Nevertheless, it is important to diagnose and treat the condition urgently as it may cause irreversible visual impairment. In this case report, we describe a 29-year-old male suffering from a blunt trauma to the eye. He developed exophthalmus and visual impairment. A blow-out fracture and haematoma in the orbital compartment was diagnosed. Successful bedside urgent lateral canthotomy and cantholysis was performed followed by semi-urgent osteosynthesis of the fracture. The patient recovered without visual impairment.