Computed Tomography-Based Comparative Study of Traumatic Atrophic Eye Measurement: Effects of Window Width and Position Adjustment.

BACKGROUND Traumatic atrophied eyeballs are often associated with intraocular structural disorders and corneoscleral thickening. Conventional methods, such as ultrasound and biological measurements, cannot accurately and objectively determine eyeball atrophy and severity. In this study, contralateral computed tomography (CT) examination was performed on 48 atrophied eyes and their 48 healthy counterparts to measure the axial length and eyeball volume. The effects on measurement results were observed after adjusting the widths and positions of the windows. MATERIAL AND METHODS This study was designed as a before-and-after control study for the treatment of eye atrophy, in which atrophied and healthy eyes underwent 3 CT examinations. The axial lengths and volumes of the 48 healthy eyes demonstrated almost no differences. These measurements were obtained using conventional (conventional group, n=48) and adjusted (adjusted group, n=48) window widths and positions. The stability of each group was statistically analyzed using the discrete coefficient of variation. A stable method was applied to measure the axial length and volume of the atrophied eyeballs to assess atrophy and severity. RESULTS The adjusted window width and position depicted the CT image contours more accurately. Compared with the conventional group, the adjusted group exhibited significantly more stable results (P<0.05). The measurement method applied to the axis and volume of atrophied eyeballs effectively determined the severity of eyeball atrophy. CONCLUSIONS CT examination can determine ocular atrophy and its severity. Adjusting the window width and position can enhance the stability of the measurement.