Fig. 2.

Axial (a) and coronal (b) views of orbital CT show extensive right-sided orbital gas and complete vitreous gas fill, with intra- and extraconal gas and tomographic evidence of proptosis in case 1. There was extensive orbital and periorbital emphysema dissecting and expanding between most of the tissue planes in the nondependent right orbit. Nerve compression resulted from the retrobulbar mass effect from this gas, which led to marked proptosis of the right globe on the CT scan. There were no bony fractures. Axial (c) and coronal (d) section of the orbital MRI shows an intraocular gas meniscus following a vitreous gas removal by needle expression, as well as intraconal gas, which was subsequently managed with needle expression of orbital gas until the IOP normalized to palpation, in case 2. MRI, magnetic resonance imaging.