The morphology of meningo-orbital foramen in south Indian population.

When present, the meningo-orbital foramen forms an additional link between the orbit and the middle cranial fossa. It contains an arterial anastomose between the middle menigeal artery--the meningo-lacrimal branch and the lacrimal artery--the meningeal branch. The incidence of this foramen is known to vary between 28-82.9%. In the present study of 138 dry adult skulls of South Indian origin, the meningo-orbital foramen was present in 80.4% of population. The mean distance of the meningo-orbital foramen from the supra-orbital notch was 34.14 mm (29-38 mm) and from the fronto-zygomatic suture it was 26.10 mm (28-35 mm). The incidence and location of the meningo-orbital foramen may be of surgical significance to ophthalmologists (Tab. 1, Fig. 3, Ref. 7).