It has been proven that sometimes, several of hours of work per day involving the use of a one-eyed microscope (for example) – which usually recognises the use of same eye time after time – causes a marked reduction of visual capacity to the eye in question. This is why it is recommended to us binocular headband magnifiers. Our headband magnifiers are finished with precision and are made of white varnished strip steel with selectable lens frames. Also suitable for wearing over glasses.