Provided is an optical component whereby the absence of eccentricity can be instantly confirmed visually even in a case that the optical component has Fresnel lens or other very fine structure. An optical component of the present invention includes an optical part and a peripheral part thereof. The optical component includes recognition marks in positions substantially plane-symmetrical to each other on a front surface side and a rear surface side of the peripheral part, the recognition marks being expressed as a recess or a projection and configured to allow eccentricity to be recognized. Two of the recognition marks are preferably similar to each other in shape, one recognition mark being preferably from 10% to 90% the size of the other recognition mark.

Use of high resolution environmental scanning electron microscopy to capture images of contact lens coating layers, enabling measurement of the coating thickness and structures of the coating layer to be precisely characterized. The coating layer can be directly visualized and quantitatively measured. Furthermore, controlled environments of varying temperatures and varying levels of relative humidity can be established in environmental scanning electron microscopy, such that the dynamic changes of the coating in such conditions can be imaged and measured. The controlled environments can be set up to mimic either the manufacturing process conditions, or be set up to simulate lens-on-eye conditions.

The present invention relates to a method for providing a model assessing a quantitative expected global quality level of an ophtalmic lens, said lens having given lens and environment parameters, and being produced by a digital lens manufacturing process. A method for real-time in-line quality audit of the freeform production line is provided, by means of a process quality score, built as the result of the normalization of the computed global quality level based on the expected value of manufactured lenses obtained by normal production.

An opaque adhesive can be used to secure the convex surface of a lens blank to a lens blocking piece. This opaque adhesive can include a resin that is curable under ultraviolet light and contains many dispersed pigment particles. The pigment particles may absorb light in the wavelength range of about 300 nm to about 800 nm such that the adhesive appears substantially opaque. A lens-on-block (LOB) system that uses the opaque adhesive to adhere a lens blank to a lens blocking piece facilitates on-block inspection of surface defects by increasing the contrast of light reflected from the surface being inspected. Put differently, the defects in the lens blank's surfaces stand out more when viewed in front of the opaque adhesive The inspection results can be used to carry out rework loops that eliminate or correct the detected defects, providing a streamlined method for on-block manufacturing of ophthalmic lenses.

A method for manufacturing a spectacle lens according to at least one data set of edging data and a computer program product with instructions for performing the method are disclosed. A spectacle lens blank, semifinished spectacle lens product, or a finished spectacle lens product is inspected for defects and compared to a data set to determine if it can be manufactured into an edged finished spectacle lens that fits into a specific spectacle frame such that the defect is not present in the edged finished spectacle lens.

The invention provides a method for imaging and thickness determination of coatings on coated contact lenses. The method comprises selectively staining a negatively-charged-groups-containing coating over the lens body of a coated contact lens by immersing the coated contact lens in an aqueous solution comprising a fluorescently-labeled polycationic polymer and having a pH of from about 6.5 to 8.0; orthogonally cutting the selectively-stained coated contact lens; and determining the thickness of the coating on the coated contact lens. In addition, the invention provides a method for selecting a candidate coating material comprising negatively charged groups for applying a coating with a desired thickness onto silicone hydrogel contact lenses and for optimizing a coating process for producing coated silicone hydrogel contact lenses with a desired thickness coating thereon.

Disclosed is a method implemented by a computer, for determining the position of an optical lens member having a surface placed on a lens blocking ring, the blocking ring including a bearing zone arranged to bear at least partially a placed known surface of the optical lens member when the known surface of the optical lens member is placed on the lens blocking ring and hold by a force applied on the optical lens member, the method includes finding a trio of points of the bearing zone that forms a triangle including the projection on the main plane of the point of application of the force; and a position of the optical lens having a virtual contact between the placed known surface and the ring at the location of the trios of points.

The invention provides a method for determining whether a coated contact lens is completely covered by a covalently bonded coating, comprising the steps of (1) providing a coated polyvinylalcohol-based hydrogel contact lens wherein the polyvinylalcohol-based hydrogel lens body is composed of a polymer comprising at least 50% by mole of repeating units of vinyl alcohol, comprising a lubricious coating covalently attached to the lens body, (2) contacting the coated polyvinylalcohol-based hydrogel contact lens with an aqueous solution of a hydrophilic marker polymer for obtaining a treated contact lens, the hydrophilic marker polymer having reactive groups of

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in which R.sub.1 is methyl or ethyl and R.sub.2 is hydrogen or a C.sub.1-C.sub.4 alkyl and a dye tag moiety, at a pH of 4.0 or less for a contacting time to covalently attach the marker polymer onto the coated polyvinylalcohol-based hydrogel contact lens through 6-membered acetal rings, (3) determining whether marker polymer is (covalently) attached to the surface of the treated contact lens.

An ophthalmic lens treatment planning System receives lens and ophthalmic lens treatment information from a customer lens order, identification of available equipment to apply ophthalmic lens treatment(s) from the customer order, and performance and parameters of the available equipment. The ophthalmic lens treatment planning System formulates an optimal ophthalmic lens treatment plan to be implemented by the available equipment to apply the ophthalmic lens treatment(s) from the customer order to the lens. Following application of the optimal ophthalmic lens treatment plan to the lens, the resulting lens may be measured to provide last run results and the last run results may be fed back to the ophthalmic lens treatment planning System to provide further performance and parameters of the available equipment to the ophthalmic lens treatment planning System.

The present invention relates to a method for providing a model assessing a quantitative expected global quality level of an ophtalmic lens, said lens having given lens and environment parameters, and being produced by a digital lens manufacturing process. A method for real-time in-line quality audit of the freeform production line is provided, by means of a process quality score, built as the result of the normalization of the computed global quality level based on the expected value of manufactured lenses obtained by normal production.