Set of semi-finished lenses with holographic components

A method of manufacturing a set of semi-finished ophthalmic lenses wherein each semi-finished ophthalmic lens is used in the manufacturing of a finished ophthalmic lens of determined target power, the method comprising:

• determining a number N of target power ranges, each range of target powers being defined by minimum and maximum target power values, and all the ranges being centered on respectively different target power values;
• for each determined target power range, determining a respective base curve of a semi-finished lens such that the base curve is suitable to be used in the manufacturing of a finished ophthalmic lens having a power within the determined target power range, wherein each semi-finished lens has the base curve chosen among a number N of base curves, N being lower than 10, and including a holographic component recorded according to a holographic component configuration chosen among a limited number M of holographic components configurations, M being superior or equal to N;
• for each base curve among the N base curves, determining a respective holographic component configuration of a holographic component to be recorded on a semi-finished lens having said base curve;
• and
• manufacturing at least one semi-finished lens of each determined base curve, wherein
• each holographic component configuration among the M holographic component configurations is associated to a single base curve among the N base curves, such that two semi-finished ophthalmic lenses of the set have a holographic component according to a same holographic component configuration only if they have the same base curve, and
• each holographic component configuration associated to a base curve is configured such that the holographic component has an optical power adapted to a middle power of the range of target powers corresponding to the base curve.

A method of manufacturing an ophthalmic lens adapted to be worn by a wearer, wherein the ophthalmic lens has a predetermined target power according to a vision of the wearer to be corrected, the method comprising:

• selecting a semi-finished lens among a set of semi-finished ophthalmic lenses, wherein the semi-finished lens is selected to have a base curve corresponding to a target power range to which belongs the predetermined target power, each range of target powers being defined by minimum and maximum target power values, and all the ranges being centered on respectively different target power values;
• and
• finishing the semi-finished lens to achieve the predetermined target power,
• wherein in the set of semi-finished ophthalmic lenses, each semi-finished ophthalmic lens is used in manufacturing of a finished ophthalmic lens of determined target power, each semi-finished lens has a base curve chosen among a number N of base curves, N being lower than 10, and including a holographic component recorded according to a holographic component configuration chosen among a limited number M of holographic components configurations, M being superior or equal to N,
• wherein each base curve among the N base curves is associated to a respective range of target powers of finished ophthalmic lenses to be manufactured from the semi-finished lenses having said base curve, each range of target powers being defined by minimum and maximum target power values, and all the ranges being centered on respectively different target power values,
• and each holographic component configuration among the M holographic component configurations is associated to a single base curve among the N base curves, such that two semi-finished ophthalmic lenses of the set have a holographic component according to a same holographic component configuration only when the two semi-finished ophthalmic lenses of the set have the same base curve, and
• each holographic component configuration associated to a base curve is configured such that the holographic component has an optical power adapted to a middle power of the range of target powers corresponding to the base curve.