Blowout fractures are common midfacial fractures in which one or several of the bones of orbital vault break. This is usually caused by a direct trauma to the eye with a blunt object such as a fist. Fracturing of the fragile orbital bones can lead to changes in the orbital volume, which may cause enophthalmos, diplopia, and impaired facial aesthetics. : The aim of this study is to investigate whether there is an association between volume change of the bony orbit and age, gender, or trauma mechanism. : A retrospective study of patients with unilateral blowout or blow-in fractures treated and examined in Päijät-Häme Central Hospital, Lahti, Finland was conducted. Altogether, 127 patients met the inclusion criteria. Their computed tomographs (CT) were measured with an orbit-specific automated segmentation-based volume measurement tool, and the relative orbital volume change between fractured and intact orbital vault was calculated. Thereafter, a statistical analysis was performed. A -value less than 0.05 was considered significant. : We found that relative increase in orbital volume and age have a statistically significant association ( = 0.022). Trauma mechanism and gender showed no significant role. : Patient's age is associated with increased volume change in fractures of the bony orbit.