Abstract
Introduction: The pyradimal shaped bony orbit communicates with middle cranial fossa by means of optic canal which transmits optic nerve and ophthalmic artery. Unilateral, bilateral duplication of optic canal is a rare entity. Methods: One hundred adult human skull bones collected from north Karnataka region were studied for duplication of optic canal. Complete duplication, partial duplication, whether unilateral or bilateral duplication were studied. Results: Out of one hundred skull bones, in one case (1%), unilateral duplication of optic canal was noted which was complete and was on left side. Conclusion: The knowledge of duplication of optic canal increases the success rate of surgical procedures of optic canal and minimizes the risk of injury to optic nerve and ophthalmic artery.
Highlights
IntroductionThe pyramidal shaped bony orbit superomedially leads to a bony optic canal which establishes communication with middle cranial fossa
The pyradimal shaped bony orbit communicates with middle cranial fossa by means of optic canal which transmits optic nerve and ophthalmic artery
Unilateral or bilateral duplications were reported by many workers earlier in the present study dry human skull bone were studied in detail regarding duplications of optic canals[2]
Summary
The pyramidal shaped bony orbit superomedially leads to a bony optic canal which establishes communication with middle cranial fossa. Optic canal is bounded laterally by the lesser wing of sphenoid, infront and behind by the two roots of lesser wing and medially by the body of sphenoid bone. It transmits optic nerve and ophthalmic artery[1]. Unilateral or bilateral duplications were reported by many workers earlier in the present study dry human skull bone were studied in detail regarding duplications of optic canals[2 ]
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