DONEGAN OPTICAL DA-4

DA-4 is an OptiVISOR precision binocular headband magnifier which permits unrestricted user efficiency while reducing eye strain—leaves both hands free and allows three dimensional vision. Used by anyone whose profession or craft requires close accurate work. Can be worn over prescription or safety eyeglasses. Ground and polished to precision optical standards—bevel edged and mounted in an interchangeable plastic frame. Adjustable pivots allow the visor to be tilted out of the way when not needed and at your fingertips when you need magnification. Conforms to fit all head sizes—fabricated from a special blend lightweight material. Comfortable when worn for long periods of time.