DESC: Nikon Trailblazer 10x50 Binoculars offer generous eye relief, 19.7 mm, and turn-and-slide rubber eyecups - allowing the binoculars to be used as comfortably and effectively by eyeglass wearers as those with uncorrected vision.Trailblazer 10x50 Binoculars incorporates its exclusive Eco-Glass (made without the use of arsenic or lead) for all lens and prism elements, as well as multicoated lenses for maximum light transmission and image quality. Ergonomic styling, mated with a rubber-armored exterior, provides added shock resistance and a firm grip, wet or dry.