A multifunctional eyewear accessory. Its compact and lightweight design also eliminates the need to worry and portability.The ruler can measure distance more accurately and improve the accuracy of measurement effectively. It is a practical and accurate eyewear accessory that provides a great for your visual experience. Features -Color:Assorted Color -Material:Plastic -Size:18.00X4.00X0.20cm/7.07X1.57X0.08in -Advanced measurement technology enables high precision measurement results. -Make your eyeglass more scientific and avoid the discomfort caused by wrong optometrist. -Provide suitable measurement for different age groups and types of glasses. Better meet the needs of different eyeglass. -Make your visual experience better and avoid the trouble caused by inaccurate optometrist. -An important tools for optical industry, providing convenient support for dispensing opticians. Package list: 2 x Pupillary Rulers