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

OBJECTIVES

To explore the correlation between the imaging parameters of skull and the external features of eyes.

METHODS

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.

RESULTS

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.

CONCLUSIONS

The established regression equations of external features of eyes have high estimation accuracy, which can be used to the practical work of facial reconstruction.