Anulus iridis minor

例句：

1. 1. The doctor performed a minor surgery on the patient's eye to remove the annular ligament.
   医生对患者的眼进行了一次小手术，以移除虹膜环。
2. 2. The annular ligament is responsible for maintaining the shape of the iris.
   虹膜环负责保持虹膜的形状。
3. 3. The patient was referred to the ophthalmologist for further examination of the annular ligament.
   患者被转介给眼科医生，进一步检查虹膜环。