In this study we analyzed and compared the orbital anatomy in Korean and Caucasian subjects using computed tomography (CT) measurements.

Two observers performed a cross-sectional, retrospective analysis of 44 CT scans of subjects (22 Koreans, 22 Caucasians) with no appreciable orbital or globe disease. Ten length measurements and 3 angle measurements of various orbital aspects were obtained. Analysis was performed to determine if changes in these parameters were associated with race.

Anterior medial interorbital length was 24.05 ± 2.00 mm in Korean and 21.96 ± 1.96 mm in Caucasian subjects. Anterior vertical orbital length was 34.19 ± 1.67 mm in Korean and 35.03 ± 1.18 mm in Caucasian subjects. The anterior medial interorbital length and anterior vertical orbital length ( p < 0.05) were significantly different. Interorbital angle was 47.69° ± 1.49° in Korean and 46.15° ± 2.19° in Caucasian subjects; the difference was statistically significant ( p < 0.05).

Compared with Caucasians, the orbit of Korean subjects has a narrower orbital opening and longer interorbital distance. The present study regarding the anatomy of Korean and Caucasian orbits will assist physicians with the evaluation and treatment of orbital diseases.