A 29 year old white male presented to the ophthalmology clinic having noticed that his right eye had been at a lower level than left one for the previous 2 years. There was no history of trauma. There were no nasal complaints or past history of sinusitis. On examination, the right globe was displaced inferiorly by 5–6 mm. Ophthalmic examination, including a visual acuity cover test and ocular movements were otherwise normal. A computed tomograph (CT) scan showed an opaque right maxillary antrum which was hypoplastic. The floor of the orbit was eroded and the right eyeball had sunk into the antrum (Fig1).