l Focus by computer design and direct reproduction in the matrix automatically provides a perfection in the assembly of the various components which enables the use of minimum thickness, resulting lightness of the final product (comfort and less chance of breakage in case drop) and a field of vision and exceptional glazed surface that percentage is 20% higher in a traditional mask. This reduction in the thickness of the frame also eliminates areas of possible contact with delicate points in terms of comfort: nose, forehead, eyebrows, ...