Custom fit a Magni-Focuser magnifier to suit your individual near-vision needs. The Magni-Focuser features an adjustable, contoured padded vinyl headband that guarantees a perfect fit. It is lightweight, comfortable, washable and can be worn over glasses. Its high impact, non-corrosive ABS plastic front lens unit is not only shatter resistant but scratch resistant as well. Since there is no center post, the field of vision is never obstructed.