Wagu drum Measure Optical Vernier PD Ruler Plastic PD Ruler for Eyeglasses pupillary Distance Ruler Ophthalmic Pupil Distance Measuring Tool (2 Pack) Ruler  (white)

【Accurate & Easy-to-Read】: Our optical PD ruler features a color-coded vernier scale that ensures precise pupil distance measurement with clear markings from 0–100mm. The high-contrast scale minimizes reading errors, making it ideal for optometrists, glasses shops, and training institutions 【 Durable & Lightweight】: Crafted from high-quality PVC plastic, this PD ruler is both lightweight and durable, resistant to daily wear and tear. Its smooth, surface protects lenses and frames from scratches, ensuring safe and hygienic use in any optical or medical environment 【Portable & Compact Design】: With a compact size of 8.2 inches (21 cm), this pupil distance measuring tool fits easily into glasses shop toolboxes, drawers, or portable kits. Its slim profile makes it a convenient tool for opticians, home visits, and on-the-go eye care professionals 【User-Friendly】: Designed for easy use, this plastic PD ruler for eyeglasses requires no installation or calibration. Simply position it on the nose bridge, align with the pupils, and read the accurate PD value instantly. Perfect for beginners, students, and experienced optometrists alike 【 Versatile Application】: This optical vernier PD ruler is essential for custom lens fitting, optometry training, and home eye exams. It also serves as a reliable tool for online glasses shopping, allowing users to measure their own PD accurately before purchase