Paine David A, Pruett Paul B, Randleman J Bradley
Ophthalmic Surg Lasers Imaging. 2010 Apr 2:1-3. doi: 10.3928/15428877-20100325-11.
An 11-year-old boy was struck in the left eye with a mechanical pencil in a projectile manner. Initial examination under the operating microscope revealed a presumed partial-thickness corneal injury with a retained 8-mm long segment of graphite lead. After removal of the graphite segment, a full-thickness hole in the cornea was revealed under the lead shaft. The proposed mechanism of injury and unique presentation was initial full-thickness penetration followed by lead shaft retraction (likely due to eye rubbing) and then corneal stromal reentry with stromal lamellar dissection and fixation. Prompt removal of the foreign body, corneal laceration repair, and early cataract extraction resulted in postoperative 20/40 uncorrected visual acuity. Mechanical lead pencil injuries represent a unique mechanism of penetrating trauma.
一名11岁男孩被自动铅笔以弹射方式击中左眼。在手术显微镜下进行的初步检查显示，推测为角膜部分厚度损伤，有一段8毫米长的石墨笔芯残留。取出石墨笔芯段后，在笔芯轴下方发现角膜有一个全层孔。推测的损伤机制和独特表现为最初的全层穿透，随后笔芯轴回缩（可能是由于揉眼），然后角膜基质再次进入并伴有基质层间分离和固定。及时取出异物、修复角膜裂伤和早期白内障摘除术后，未矫正视力为20/40。自动铅笔机械性损伤是一种独特的穿透性创伤机制。
