Method for machining and estimating an optical lens designed as a smei-finished product

A method for machining and estimating an optical lens which is designed as a semi-finished product, with a pre-specified form of a first side and a second side which is to be machined, in which a pre-specified form of a surface of the second side to be machined is estimated, comprising the steps of:

• a) prior to estimation of the pre-specified form of the surface of the second side, measuring an actual form of the surface of the first side using measuring means
• b) incorporating the actual form of the surface of the first side incorporated into the estimation of the pre-specified form of the surface of the second side and,
• c) connecting the semi-finished product with the surface of the first side with a block piece, wherein the actual form of the surface of the first side is measured after blocking on.