| Summary: | Objective: The main objective is to analyze the differences between the orbital cavities according to age and sex in a population from the Northeast of Brazil and compare with a specific Chinese population. Methodology: Linear measurements on 8 points of the orbit were made in a sample of 113 patients, based on each sex and age range (<19, 20–39, 40–59 and ≥ 60 years old). The distances were orbital width, orbital height, medial orbital wall, lateral orbital wall, superior orbital wall, inferior orbital wall, interorbital width, and biorbital width. Results: It was noticed that the orbital cavities of men were higher in all measures than those of women (P < 0.001), except for the orbital height and the distance between the orbits. Younger patients showed a tendency to have smaller orbits. Comparing the measurements obtained for the Brazilian participants with those of Chinese, the orbits of Brazilians were significantly higher on all measures (P < 0.001), except for biorbital breath. Conclusion: There were significant differences between most measures of orbital cavities between men and women in the Brazilian population, while differences were seen in all measurements between Brazilian and Chinese population.
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