sight blade

例句：

1. 1.The surgeon used a sight blade to cut through the tissue.
   外科医生用一把视力刀片来切割组织。
2. 2. The chef carefully sliced the meat using a sight blade.
   厨师小心翼翼地用一把视力刀片切肉。
3. 3. The tool is designed to help people with poor eyesight use it as a sight blade.
   这个工具被设计用来帮助视力不佳的人使用它作为视力刀片。