A method for producing an ophthalmic lens, the method comprising: identifying 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; wherein the zones include: 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; and 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; selecting, for each of the zones, one or more parameters for producing the lens, the one or more 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 one or more parameters for at least one of the zones differ from the one or more parameters of at least one other of the zones; and producing the lens by removing material from the lens blank according to the one or more parameters of each of the zones; characterized in that identifying the zones includes identifying supported zones and/or optically-useful zones and/or zones that overlie and/or underlie a component of the lens and/or optically-sensitive zones (226g-j), wherein zones that overlie and/or underlie the component is, all or substantially all of which lies within a volume defined by: a generatrix that is a surface of the component; and a directrix that is the Z-axis, wherein optically sensitive zones are those that underlie and/or overlie optically-sensitive portions of the lens, wherein optically-sensitive portions comprise a distance vision portion of the lens and/or a near vision portion of the lens and/or a portion including a prism reference point of the lens and/or a portion including a fitting point of the lens and/or a portion including a progressive corridor of the lens, wherein optically-useful zones are defined by grouping optically-useful ones of the points whose radius is less than the radius of the lens shape at angle Θ of the lens. identifying 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; a front face; a back face; and an edge that connects the front face and the back face; wherein the zones include: 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; and 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; 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; and a peripheral zone bounded by a periphery of the face that surrounds the interior portion of the face; and an interior zone bounded by an interior portion of the face; and 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; selecting, for each of the zones, one or more parameters for producing the lens, the one or more 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; 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 one or more parameters for at least one of the zones differ from the one or more parameters of at least one other of the zones; and producing the lens by removing material from the lens blank according to the one or more parameters of each of the zones; characterized in that identifying the zones includes identifying supported zones and/or optically-useful zones and/or zones that overlie and/or underlie a component of the lens and/or optically-sensitive zones (226g-j), wherein zones that overlie and/or underlie the component is, all or substantially all of which lies within a volume defined by: a generatrix that is a surface of the component; and a directrix that is the Z-axis, wherein optically sensitive zones are those that underlie and/or overlie optically-sensitive portions of the lens, wherein optically-sensitive portions comprise a distance vision portion of the lens and/or a near vision portion of the lens and/or a portion including a prism reference point of the lens and/or a portion including a fitting point of the lens and/or a portion including a progressive corridor of the lens, wherein optically-useful zones are defined by grouping optically-useful ones of the points whose radius is less than the radius of the lens shape at angle Θ of the lens.