Musculus sphincter pupillae

例句：

1. 1.The doctor examined the patient's eyes and found that the Musculus sphincter pupillae was weak.
   医生检查了病人的眼睛，发现瞳孔括约肌很弱。
2. 2. During the operation, the surgeon made a small incision in the muscle to control the pupil.
   手术中，外科医生在肌肉上做了一个小切口来控制瞳孔。
3. 3.The patient's condition worsened after the surgery, and the doctor had to re-operate on the Musculus sphincter pupillae.
   手术后，患者的病情恶化了，医生不得不重新对瞳孔括约肌进行手术。