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Eyvia 1.74 the thinnest plastic spectacle lens material by Hoya. Ultra-thin, light, break-resistant and optically brilliant. Most spectacle wearers appreciate the comfort of thinner, lighter lenses, for esthetic reasons, too. The new plastic material Eyvia 1.74 meets this need with a high refractive index that enables extremely thin and lightweight lenses. At the same time the special polymer blend ensures durable crystal-clear optical quality. The ultra-thin lenses made from the material Eyvia 1.74 are break-resistant, can be easily drilled and edged and are thus easy to fit into any frame.