Intrastromal corneal ring segments (ICRSs) are an effective treatment for stabilizing and normalizing corneal shape in patients with keratoconus and other corneal ectasias. Intraoperative segment perforation through the corneal endothelium into the anterior chamber (AC) is an uncommon but known complication. However, perforation into the AC postoperatively is an exceedingly rare complication with only 3 reported cases in the literature. One case was due to Descemet membrane detachment and another due to ocular trauma. In the third case, the mechanism for perforation was unclear. We present the fourth case of delayed ICRS perforation due to silent migration through the endothelium into the AC. We also present all reported cases in the literature of intraoperative and postoperative perforation into the AC.
Case Rep Ophthalmol 2021;12:740–748

中文翻译：

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角膜基质内环段延迟穿孔进入前房：病例报告和文献复习

基质内角膜环段 (ICRS) 是稳定和正常化圆锥角膜和其他角膜扩张患者角膜形状的有效治疗方法。术中通过角膜内皮穿孔进入前房 (AC) 是一种罕见但已知的并发症。然而，术后 AC 穿孔是一种极为罕见的并发症，文献中仅有 3 例报道。一个病例是由于 Descemet 膜脱离，另一个是由于眼外伤。在第三种情况下，穿孔的机制尚不清楚。我们介绍了第四例由于无声迁移通过内皮进入 AC 导致 ICRS 穿孔延迟的病例。我们还介绍了术中和术后穿孔到 AC 的文献中所有报告的病例。
Case Rep Ophthalmol 2021；12:740–748