Methods and systems for producing ophthalmic lenses background

A method implemented by a system for use in producing an ophthalmic lens, the method comprising:

• identifying, by at least one processor, a plurality of zones within a spatial representation of a lens blank, the zones being identified relative to an ophthalmic lens to be produced from the lens blank,
• the lens including:
• a front face,
• a back face, and
• an edge that connects the front face and the back face,
• and the zones including, for each of at least one of the front face and the back face of the lens:
• an interior zone bounded by an interior portion of the face,
• a peripheral zone bounded by a periphery of the face that surrounds the interior portion of the face, and
• a waste zone that is bounded by neither the front face nor the back face of the lens,
• wherein, for each of the plurality of zones, identifying the plurality of zones comprises at least one of:
• identifying at least one supported zone that overlies a blocking material that supports the lens blank during production of the lens, and
• identifying at least one optically-useful zone of the lens, and
• identifying at least one zone that overlies and underlies a component of the lens, and
• identifying at least one optically-sensitive zone;
• and
• selecting, by the at least one processor, for each of the zones, parameters for producing the lens, the parameters including:
• an implement for removing material from the lens blank, and;
• a rotational speed of the implement relative to the lens blank, and/or
• a translational speed of the implement relative to the lens blank, and/or
• a depth of cut of the implement into the lens blank,
• wherein the parameters for at least one first one of the zones differ from the parameters of at least one different second one of the zones;
• and
• producing the lens by removing material from the lens blank according to the parameters of each of the plurality of zones.