OBJECTIVETo determine the incidence of optic nerve patterns in sphenoid sinus in the Indian population.
METHODSComputed tomographic scans of paranasal scans were reviewed. Optic nerve configurations were assessed using DeLano's classification.
RESULTS202 optic nerves in 101 patients were studied. Type I configuration was commonest with 55.45% followed by Type II (23.27%), Type IV (11.88%) and Type III (9.40%). Onodi cells were significantly found to be left sided (61.9%) in our study.
CONCLUSIONOur study corresponds to the studies done in western literature. We differ in having no optic nerve dehiscence and the Onodi cell being predominantly left sided.
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