- Precise PD Adjustment: Easily adjust the pupil distance from 48mm to 80mm with a convenient button, allowing for a personalized fit. This feature ensures optimal comfort during visual acuity testing. - Ample Lens Storage: Each frame can accommodate up to 4 pairs of lenses simultaneously—either the left or right frame—making it ideal for quick lens changes and efficient testing. - Versatile Applications: Perfect for use in opticians, hospitals, schools, factories, and mining companies. This device is essential for professionals needing reliable visual acuity assessments in various settings. - Customizable Comfort: The height and tilt angle of the nose pads are adjustable, providing a user-friendly experience that caters to a wide range of facial shapes and sizes. - Durable Design: Constructed with high-quality materials, this product ensures longevity and reliable performance in demanding environments. - User-Centric Features: Its design prioritizes ease of use and adaptability, making it suitable for both experienced professionals and newcomers in visual testing. By incorporating these features, this product stands out as an essential tool for accurate and effective vision assessments across multiple industries.