1、When you want to measure the distance between your pupils, you can use this pupil distance gauge, which can be of great help to you. 2. This PD ruler is made of high-quality PVC material and has clear and distinct scales, allowing for precise control of the size chart. 3. The package contains 1 piece of interpupillary distance meter, with dimensions of 21*5.4*0.7CM. 4. This is an excellent promotional item, very suitable for hospitals, medicines or supplies. 5. How to use: Look straight ahead with your eyes, place the gap on your nose, and get as close as possible to the middle line.
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