DescriptionThis pupillary distance ruler is a simple and practical eyewear accessory that will provide you with greater precision in your eyewear. It is easy to operate without technical design and quickly measures the pupil distance to ensure more accurate optometrist. Its compact and lightweight design also allows you to use it anywhere, anytime.Features-Color:As Shown -Material:Plastic -Size:17.50X3.50X0.10cm/6.88X1.38X0.04in -Pupillary distance ruler for more accurate for optometrist and better visual experience.-Strict produce control standards. Small and lightweight design, carry around without taking up space.-Plastic material manufacturing, long-term use without worrying about damage. Improve work efficiency.-In addition to measuring pupil distance, it can also be used as an eyes shield to protect eye health.-Fine measuring distance, easy to operate and easy to use without professional knowledge.