Semi-finished optical element for manufacturing an ophthalmic article, ophthalmic article and related manufacturing method

A system comprising:

• a set of blanks;
• and
• a set of optical components layers for manufacturing ophthalmic articles of given prescriptions, wherein:
• the blanks have a front diopter and a rear diopter and at least one diopter is curved, at least two blanks having different base curves, one of the front and rear diopters being unfinished and the other being finished,
• the optical components layers have an arrangement of periodic or pseudo-periodic optical wave front shaping elements that are smaller than 10 μm and configured to control incoming light at least in a part of a visible spectrum, at least two optical components layers having a different optical power,
• wherein the optical component layers are transparent in transmission in a visible wavelength and are configured to be disposed on one associated finished diopter of the blank for cooperating together to achieve, after surfacing of the unfinished diopter of the blank, ophthalmic articles of given prescriptions.

A method for manufacturing an ophthalmic article with a prescribed vision correction, comprising:

• providing a prescription with a prescribed vision correction;
• providing a semi-finished optical element including at least one blank having a front diopter and a rear diopter configured to present a first optical power distribution, one of the front and rear diopters being unfinished and the other finished;
• providing an optical component layer having a periodic or pseudo-periodic arrangement of optical wave-front shaping elements that are smaller than 10 μm and configured to control incoming light at least in a part of a visible spectrum;
• providing a second optical power distribution,
• wherein the optical component layer is transparent in transmission in a visible wavelength and is disposed on the finished diopter of the blank for cooperating together to achieve a third optical power distribution;
• and
• surfacing the unfinished diopter of the blank of the selected semi-finished optical element to get the ophthalmic article with the prescribed vision correction.