眼球是一个近似球形体,平均直径为24mm。(前后、垂直、水平直径略有差异),从前极到后极,同一子午线上的球壁各点距中心轴即前后轴的距离也不尽相同(眼球赤道部距中心轴距离最大,而愈近两极距中心轴的距离渐小)。如果从角膜缘算起把各点距中心轴的距离,都测量出来编成口诀熟记,那么遇到眼球异物伤的患者,只要用尺测量一下标有标记的X线正、侧位平 The eyeball is an approximately spherical body with an average diameter of 24mm. (Before and after, vertical, horizontal diameter slightly different), from the pole to the posterior pole, the same meridian of the ball wall from the central axis that is, the distance between the anterior and posterior axis (eye equatorial distance from the central axis maximum, and more Near the poles from the central axis of the smaller distance). If the distance from the limbus to the central axis from the limbus are measured out into the recipe compiled memorize, so encounter eyeball foreign body injury patients, as long as the ruler to measure the marked X-ray positive, lateral flat