Orbital volume in young and adult rabbits

One hundred and ninety-nine postnatal volumetric determinations were made of orbits from 159 young and adult rabbits (64 New Zealand, 95 Dutch) by means either of linear measurements or of removable permanent elastic rubber base imprints. The volumes were calculated from the weights and specific gravities of the orbital imprints. Orbital volume in the New Zealand albino rabbits ranged from 0.7 ml at 14 days to 7.8 ml at 302 days of age. By about 180 days of age orbital volume had reached about 6.5 ml, near its maximum, and was about nine times the size at 14 days of age. Orbital volume in the Dutch rabbits ranged from 3.6 ml at 98 days to 5.8 ml at 540 days of age and were smaller than the New Zealand rabbit orbital volumes. By about 180 days the Dutch rabbit orbital volume had reached its maximum of about 5 ml and was about 25 percent larger than at 100 days of age. Values of orbital volume for the Dutch rabbits correlated noticeably with weight.