Product Quantity and Exact Size: This package includes 1pcs of ophthalmic pupil distance measuring tool, specifically designed as a compact yet precise measure optical vernier pd ruler with an overall length of 8.19 inch, making it easy to store in glasses shop toolboxes, drawers, or portable workstations without occupying excessive space
Material: Crafted from lightweight plastic material, this pd ruler offers excellent durability and resistance to daily wear and tear, avoiding easy breakage even with frequent use in busy glasses shop environments; the smooth plastic surface also prevents scratches on lenses or frames during measurement, and its non-toxic, odorless properties comply
Creative and Unique Design Features: This optical vernier pd ruler boasts a series of creative design elements, such as a clear, color-coded vernier scale that enhances readability and reduces measurement errors, and an ergonomic curved edge that fits comfortably in hand, preventing slippage during use
Easy to Use: Even for new optometry staff, this ophthalmic pupil distance measuring tool is incredibly easy to use—no complex installation or calibration is required; simply take it out of the package, place it appropriately according to standard measurement procedures, and the clear vernier markings allow for quick and accurate reading of pupil distance values, eliminating the need for time-consuming setup steps
Wide Application: This measure optical vernier pd ruler is not only a essential tool for glasses shops to measure customers' pupil distance for lens customization, but also serves as a practical pupillary distance measurement tool for optometrists during home visits, optical training institutions for teaching purposes, and even individuals who need to verify their pupil distance before purchasing glasses online
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