Estimation of External Features of Eyes for the Adult Male of Han Nationality in Northeast China Based on the Characteristics of Skull

Abstract

To explore the correlation between the imaging parameters of skull and the external features of eyes. Positive images of the head face and the frontal and lateral X-ray films were obtained from 101 cases of adult males of the Han nationality aged from 20 to 40 years old in Northeast China. The face width （x₁）, upper face width （x₂）, biorbital width （x₃）, all facial height （x₄）, upper facial height （x₅）, maximum breadth of skull （x₆）, minimum breadth of frontal bone （x₇）, orbital widthⅡ（x₈）, anterior interorbital breadth （x₉）, maximum height of skull （x₁₀）, minimum width of nasal bone （x₁₁） and orbital height （x₁₂） were measured and the data were statistically analysed. Through the linear regression analysis, the regression equations of the presumed inboard canthi （y₁） and outboard canthi distances （y₂） were established, respectively, which were y₁=0.025 x₂+0.291 x₃-0.011 x₇+0.041 x₁₀-0.525（R=0.613, SEE=0.222 cm） and y₂=1.703-0.08 x₂+0.573 x₃-0.142 x₄+0.421 x₅+0.096 x₇-0.256 x₈+0.149 x₉+0.071 x₁₀（R=0.745, SEE=0.341 cm）. The back-substitution check showed that the accuracy rate of two equations at ±1SEE were 75.2% and 80.2%, respectively. The established regression equations of external features of eyes have high estimation accuracy, which can be used to the practical work of facial reconstruction.