vision tester

例句：

1. 1.The engineer used the vision tester to inspect the machine's eyesight.
   工程师使用视觉测试器检查机器的视力。
2. 2.The doctor recommended a vision tester as a preventive measure for nearsightedness.
   医生推荐了一台视觉测试器作为预防近视的措施。
3. 3. The new software has a built-in vision tester that can detect eye strain and fatigue.
   这款新软件内置了一个视觉测试器，可以检测眼疲劳和紧张。