Tolarations For Uncut Lenses
Turkish Standard of EN ISO 8980-2
Power Tolarations On Lenses Values are in Dioptries.
Tolerances in Cylindrical Axis Direction
Tolerances in Addition
Tolerances in Optical Centralization
and Prismathic Power
Material And Surface Quality
Assessment: There should be no defect that may prevent the vision inside the lenses or on the surface within an area of 30 mm in diameter centered near the prism reference point. Minor defects inside and/or on the surface of the lenses outside this area are acceptable.