Attached
Purpose: Anatom ical proportion and osteom etric
m easurem ents in orbits are vital for clinical assessm ent
and treatm ent of patients, which vary considerably
am ong nations w orldwide. These m easurem ents are
of value in a variety of specialities such as craniofacial
reconstructive surgery, genetic counseling, and forensic medicine. This study w as carried out to assess the
osteom etric m easurem ents of orbits of Sri Lankans.
M e th o d s: Tw enty-seven bony skulls were obtained
from the Departm ent o f Anatom y of the University of
Sri Jayewardenepura, which were categorized into either sex according to external characteristics. M e asu re
m ents were obtained using a m anual vernier caliper by
2 authors independently. Each m easurem ent w as done
3 times, and the m ean value w as taken.
Results: M e an orbital index (M O I) varied from 0.84
± 0.06 cm, with half of the sam ple [50% (27/54)] and
27.7% (15/54) belonging to the m icrosom e and megasom e categories, respectively. Both categories had
equal sex distribution and were higher than the present literature. M icrosom e and m egasom e categories
were com m only right [59.3% (16/27)] and left [66.7%
(10/15)] orbits, respectively. M e an orbital width (3.83
± 0.28 cm) w as greater than m ean orbital height (3.21
± 0.16 cm). Biorbital distance and intraorbital distance
had a m ean value of 9.51 ± 0.47 cm and 2.09 ± 0.36
cm, respectively, with equal sex distribution. Interfronto-m alare-tem poral m ean distance w as 10.91 ± 0.41
cm with no sex difference.
Conclusions: Orbital param eters in the adult population provide a useful baseline and anthropom etric
data, which will be of clinical and surgical interest in
ophthalm ology, oral and maxillofacial surgery, and
even neurosurgery. M o re extended research is needed
to develop Sri Lankan reference values.
