[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 （₁）, upper face width （₂）, biorbital width （₃）, all facial height （₄）, upper facial height （₅）, maximum breadth of skull （₆）, minimum breadth of frontal bone （₇）, orbital widthⅡ（₈）, anterior interorbital breadth （₉）, maximum height of skull （₁₀）, minimum width of nasal bone （₁₁） and orbital height （₁₂） were measured and the data were statistically analysed.

RESULTS

Through the linear regression analysis, the regression equations of the presumed inboard canthi （₁） and outboard canthi distances （₂） were established, respectively, which were ₁=0.025 ₂+0.291 ₃-0.011 ₇+0.041 x₁₀-0.525（=0.613, =0.222 cm） and ₂=1.703-0.08 ₂+0.573 ₃-0.142 ₄+0.421 ₅+0.096 ₇-0.256 ₈+0.149 ₉+0.071 ₁₀（=0.745, =0.341 cm）. The back-substitution check showed that the accuracy rate of two equations at ±1 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.