Pupillometers for Measuring Pupillary Distance with Electronic Instruction Manual Transparent Pupillary Distance Ruler for Pupil Measuring, Essential Tool for Single PD or Dual PD Measurement

["【Electronic Manual 】We provide a detailed electronic instruction manual for this pupillary distance measurement tool, which you can easily access and save on any digital device. The manual includes comprehensive guidance on using the PD ruler for accurate single PD or dual PD measurement, ensuring you have all necessary information without physical clutter.","【High-Quality Transparent Material】This pupillary distance ruler is crafted from flexible and lightweight high-transparency PVC material, making it an essential and durable optician tool for home use. The clarity of the material allows for easy alignment with your pupils, facilitating precise PD measurement critical.","【Stable Dual & Single Measurement】Featuring an innovative straight-edge design integrated with a centered nose bridge, this PD measurement tool ensures stability and proper alignment during use. This design is fundamental for obtaining accurate measurements for both single PD (the distance from the bridge of your nose to the center of one pupil) and dual PD (the separate measurements for each eye).","【Multi-Functional Scale Design】This versatile eye measuring tool incorporates three distinct scale options on a single ruler, enabling you to quickly measure complete PD range (46mm to 84mm) or individual eye PD (23mm to 42mm). This multi-functional scale design eliminates the need for multiple tools and simplifies the process of obtaining the precise values required for ordering eyeglasses.","【Comprehensive User Guidance】Beyond being a simple measurement tool, this product includes thorough instructional support and scientific eye care tips. The provided materials guide you step-by-step through the PD measurement process, saving your time."]