Lens for binocular visual aid for close range, has first surface texture on surface, which is rotating symmetrical around axis of rotation arranged outside lens for producing prismatic refraction power

摘要

Lens (4) has a first surface texture (6) on the surface, which is rotating symmetrical around an axis of rotation (8) arranged outside the lens for producing prismatic refraction power. The first surface texture forms an opening from border area through focusing lens.