iris diaphragm

例句：

1. 1. The doctor useda new iris diaphragm to repair the patient's eye.
   医生使用一种新的虹膜隔板来修复病人的眼睛。
2. 2. The iris diaphragm is responsible for controlling the amount of light that enters the eye.
   虹膜隔板负责控制进入眼睛的光量。
3. 3. During surgery, the iris diaphragm is carefully removed to avoid damaging the delicate tissue.
   在手术过程中，小心地移除虹膜隔板以避免损伤脆弱的组织。