- Easy PD Adjustment: Features a convenient button for precise 1.48-80mm pupillary distance adjustments, ensuring accurate fitting for every user. - Generous Lens Capacity: The left or right frame can accommodate up to 4 pairs of lenses simultaneously, making it ideal for busy environments and quick assessments. - Versatile Applications: Perfect for visual acuity testing in various settings, including opticians, hospitals, schools, factories, and mining companies, supporting diverse testing needs. - Customizable Comfort: Adjustable height and tilt angle of the nose pad provide a user-friendly experience, accommodating most facial structures for optimal comfort during tests. - Durable and Reliable: Built with high-quality materials to ensure longevity and consistent performance in professional environments, providing peace of mind for users and practitioners alike. This product is designed to enhance efficiency and accuracy in visual assessments, making it an essential tool for professionals in the optical field and beyond.