We report the case of a 23-year-old male who was referred to our clinic for a routine follow-up examination. The patient was treated for keratoconus 3 years ago in Colombia, where intracorneal ring segments were implanted mechanically in both eyes to improve his visual acuity. Surprisingly, we discovered a pre-descemetic placement of intracorneal ring segments, which could lead to potential complications, under circumstances. We illustrate this impressive finding with slit-lamp photography and high-resolution anterior segment OCT and advocate for the use of femtosecond laser as the method of choice for intracorneal ring segment insertion in order to provide maximal precision and safety.
Case Rep Ophthalmol 2021;12:940–943

中文翻译：

---

机械植入后圆锥角膜角膜内环段的前脱位放置

我们报告了一名 23 岁男性的病例，他被转诊到我们的诊所进行常规随访检查。3 年前，该患者在哥伦比亚接受了圆锥角膜治疗，角膜内环段被机械植入双眼以提高他的视力。令人惊讶的是，我们发现了角膜内环段的脱除前放置，在某些情况下这可能导致潜在的并发症。我们通过裂隙灯摄影和高分辨率前段 OCT 来说明这一令人印象深刻的发现，并提倡使用飞秒激光作为角膜内环段插入的选择方法，以提供最大的精度和安全性。
Case Rep Ophthalmol 2021；12:940–943