A method includes providing an ophthalmic lens having a prescribed optical power, the ophthalmic lens having a surface having a base curvature corresponding to the prescribed optical power, and exposing a material at the surface to laser radiation sufficient to locally reshape the material to form a plurality of lenslets on the surface. The lenslets each have a corresponding optical power that differs from the prescribed optical power of the ophthalmic lens.

In the embodiments, an aqueous hydrochloric acid solution instead of hydrogen chloride gas and solid triphosgene instead of phosgene gas may be used in the process of preparing a diisocyanate from a diamine through a diamine hydrochloride. In addition, the embodiments provide processes for preparing a diisocyanate composition and an optical lens of higher quality by controlling the water content in the diamine hydrochloride composition for preparing a diisocyanate within a specific range.

A deflashing machine (100) including a lens-mold-assembly-rotation mechanism (110) having a coaxially aligned first and second rotary parts (112, 114). The first and second rotary parts (1112, 114) being operable for holding the lens-mold-assembly (102) therebetween, and rotatable about a common axis (113). The machine further includes a deflashing mechanism (120) having a first blade (130) and a second blade (140) disposed at a first radial position and a second radial position from the common axis (113) respectively. The first blade (130) having a trimming edge (132) parallel to the common axis (113) for engaging a circumferential surface of the lens-mold-assembly (102) held between the first rotary part (112) and the second rotary part (114). The second blade (140) having a trimming edge (142) radially aligned with respect to the common axis (113) for engaging a convex surface (106) or a concave surface (101) of the lens-mold-assembly (102) held between the first rotary part (112) and the second rotary part (114).

A method for manufacturing a spectacle lens including a lens substrate and at least one coating is disclosed. The method includes at least the following steps of providing a lens substrate comprising an uncoated or precoated front surface and an uncoated or precoated back surface, covering at least one of the surfaces of the lens substrate partially or completely with at least one coating composition, drying and/or precuring the at least one coating composition, contacting the surface of the at least one coating composition with at least one mechanical means, curing and/or hardening the at least one coating composition and obtaining a spectacle lens comprising a lens substrate and at least one coating, the surface topography of the at least one coating being modified by the at least one mechanical means.

The present invention relates to a thermosetting composition for the manufacture of an ophthalmic lens which efficiently absorbs light rays without degradation of the light-absorbing additive, said composition comprising an allyl monomer or oligomer, a catalyst, at least one light-absorbing additive contained in nanoparticles which are dispersed in said allyl monomer or allyl oligomer. The present invention also relates to the use of said composition and to the ophthalmic lens obtained from said composition.

A method of manufacturing a plastic lens includes first heating of a lens preform, disposing the lens preform in a molding apparatus, second heating of the lens preform, pressing the lens preform with the molding apparatus, and cooling the molding apparatus.

Provided is a method for evaluating production precision of a spectacle lens having micro convex segments protruding from a convex surface on an object side of the spectacle lens, including measuring a shape of the convex surface of the spectacle lens; setting an actual device virtual model including a spectacle lens model based on the measured shape and an eyeball model; performing ray tracing calculation on the actual device virtual model and specifying an actual device convergence position where light rays converge on an front side of a retina of the eyeball model; and evaluating production precision of the spectacle lens on the basis of the actual device convergence position.

A method for printing a three-dimensional optical component (2) with an inkjet printer (1), wherein the three-dimensional component (2) is built up from layers of printing ink through a targeted placement of droplets (6) of printing ink at least partially side by side and one above the other in successive printing steps, wherein at least one printing step is followed by: a first scanning step during which surface properties of the two dimensional surface defined by the last printed layer are determined through a one dimensional measurement along a first direction by a measurement means (7), a rotation step during which the structure built up in the preceding steps is rotated with respect to the measurement means by a defined rotation angle and a second scanning step during which surface properties of the two-dimensional surface are determined through a one-dimensional measurement along a second direction by the measurement means.

A method for printing a three-dimensional optical component (1), wherein the three-dimensional component (1) is built up from layers of printing ink which are printed at least partially one above the other in consecutive layer-printing steps, wherein during at least one layer-printing step a layer is printed in multi-pass mode, wherein the multi-pass layer (4) is divided into multiple sublayers (3) which are printed in consecutive sublayer-printing steps such that during each sublayer-printing step only part of the multi-pass layer (4) is printed and the full multi-pass layer (4) is obtained through the multiple sublayer-printing steps.

A method for printing a three-dimensional optical component comprising a boundary portion and a remaining portion, comprising the following steps: building up the three-dimensional component from layers of printing ink, wherein each layer is obtained through a targeted placement of droplets of printing ink at least partially side by side, wherein the boundary portion of the three-dimensional component is printed during a boundary defining step followed by a filling step during which the remaining portion is printed.