Method and system for determining an optic center of a lens blank

A method for determining a position of an optic centre of a lens blank, said lens blank being an intraocular lens blank or a contact lens blank, and comprising the following steps:

• a) providing a light source for generating a light beam;
• b) providing a visualization module;
• c) positioning said lens blank between said light source and said visualization module along a possible optical path of said light beam, such that said visualization module is positioned to detect light generated by said light source and passing through said lens blank;
• d) providing actuators positioned to induce a relative displacement between said visualization module and said lens blank;
• e) illuminating said lens blank with a light beam generated by said light source;
• f) visualizing in a field of view of the visualization module a spot obtained from the light generated in the previous step and passing through the lens blank;
• h) inducing a relative displacement between said visualization module and said lens blank in order to move the spot of previous step closer to a reference point in the field of view of said visualization module;
• i) repeating steps e) to h) until a distance between the reference point and the spot of previous step fulfils a distance criterion;
• j) determining a position of an optic centre of the lens blank by using the magnitudes of the relative displacements carried out in step h) to fulfil the distance criterion of previous step, the position of the optic centre of the lens blank being coordinates of the optic centre of the lens blank with respect to the reference point.