The DA-7 Donegan OptiVISOR stands out as a premier hands-free, headband binocular magnifier, featuring 2.75x magnification through optical glass lenses that have been meticulously ground and polished to prismatic specifications for unmatched clarity and quality. It offers a precise focal length of 6 inches, catering to close-up tasks, with additional lenses available in various magnifications to meet specific distance and magnification needs.Renowned for its exceptional quality and durability, the Donegan OptiVISOR has been a staple in the USA for over 30 years, earning its reputation as the leading headband magnifier on the market. Designed for versatility, it can comfortably be worn over most prescription glasses and safety eyewear. Furthermore, it's compatible with Magnifier.com standard size lenses, making it a flexible option for users of various headband magnifiers. The OptiVISOR's commitment to enhancing visual precision and detail makes it an indispensable tool for professionals and hobbyists alike.