Anulus iridis major

例句：

1. 1. The anulus iridis major plays a crucial role in the eye's health.
   虹膜环在眼睛健康中起着至关重要的作用。
2. 2. The doctor performed a thorough examination of the patient's anulus iridis major.
   医生对患者的虹膜环进行了彻底的检查。
3. 3. The anulus iridis major is responsible for maintaining the proper alignment of the eyeball.
   虹膜环负责保持眼球的适当对准。