エアバッグ眼外傷の2例

Two cases of ocular injury due to air-bag activation

　シートベルト着用下でのエアバッグ作動による眼外傷を2例経験した。症例1は助手席にいた62歳の男性。左眼は角膜内皮障害，虹彩離断，水晶体脱臼，硝子体出血，外傷性黄斑円孔を生じており緊急に手術した。術後，矯正視力は右眼1.2，左眼0.05であった。症例2は運転手の62歳，男性。左眼の角膜びらん，角膜内皮障害，網膜振盪，黄斑浮腫を認めた。受傷後1か月の左眼矯正視力は0.9であった。2例とも左眼のほうが右眼より障害が高度であり，また角膜内皮障害が強かった。エアバッグ眼外傷の予後は比較的に良好のことが多いが，症例1のように視力改善が不十分となる場合もある。今後，衝突安全装置のさらなる改善が望まれる。

We observed two cases of ocular injury due to air-bag activation. Both the cases were wearing a seat-belt at the time of injury. One was a 62-year-old male who was seated at the passenger seat in the front row. His left eye showed corneal endothelial damage, iridodialysis, lens luxation and vitreous hemorrhage. Traumatic macular hole was found after the second surgery two weeks after the injury. The final visual acuity of 0.05. The corneal endothelial cell population per mm³ was 1,547 right and 2,012 left. The other was a 62-year-old male driver. His left eye showed corneal erosion, corneal endothelial damage, commotio retinae and macular edema. The visual acuity improved to 0.9 one month after injury. The corneal endothelial cell population was 2,915 right and 1,447 left. These two cases showed that the left eye was more severely affected than the right and that corneal endothelial damage was an outstanding feature.