Optic nerve avulsion due to forced rotation of the globe by a snooker cue.

We report a case of partial avulsion of the optic nerve caused by sudden rotation of the globe due to a snooker cue injury. Minimal direct ocular trauma occurred. This case supports the belief that sudden rotation of the globe is the major mechanism of optic nerve avulsion. We include the first results of ultrasound examination that demonstrate optic nerve injury in such a case and believe that, in conjunction with fluorescein angiography and computerised tomography, it is important in the full evaluation of such cases.