Abstract: The present invention provides a method for manufacturing a photochromic article having a photochromic compound containing layer. The method includes the step of coating a casting face of at least one mold section with a photochromic host layer. The photochromic host layer is treated to minimize damage during subsequent steps, and a mold is then assembled so that it includes the mold section having the photochromic host layer. The mold is then filled with a photochromic article monomer composition and the monomer composition is subsequently cured to form a photochromic article substrate adhered to the photochromic host layer. The photochromic compound is introduced into the photochromic host layer.

Abstract: The present disclosure provides a method of forming a removable protective coating on a hydrophobic surface of an ophthalmic lens element. The method includes providing an ophthalmic lens element having a hydrophobic surface. A non-aqueous coating composition is applied so as to coat at least part of the hydrophobic surface. The composition includes a film forming coating polymer and a compatible non-aqueous solvent. A substantial portion of the solvent is removed from the composition to form a removable protective coating on the ophthalmic lens element that adheres to the hydrophobic surface. The disclosure also provides a removable protective coating, and an ophthalmic lens element having the coating.

Abstract: A coating forming composition that includes: (a) a silane derivative of Formula (I) wherein R1, R2, R3 and R4 that can be the same or different are selected from alkyl, acyl, alkylene acyl, cycloalkyl, aryl or alkylene aryl that can where necessary be substituted, and/or a hydrolysis product and/or condensation product of the silane derivative of Formula (I), (b) a silane derivative of Formula (II) R6R73-nSi(OR5)n??(II) wherein R5 is an unsubstituted or substituted alkyl, acyl, alkylene acyl, cycloalkyl, aryl or alkylene aryl group, R6 is an organic residue that contains an epoxide group, R7 is an unsubstituted or substituted alkyl, cycloalkyl, aryl or alkylene aryl group, n is 2 or 3, and/or a hydrolysis product and/or condensation product of the silane derivative of Formula (II), (c) a colloidal inorganic oxide, fluoride or oxyfluoride, (d) a cycloaliphatic or aromatic epoxide, and (e) a solvent.

Abstract: The invention provides a coating composition for an optical element, such as an ophthalmic lens. The coating composition includes a relatively rigid multifunctional monomer and a relatively flexible difunctional monomer. The rigid multifunctional monomer and the flexible difunctional monomer are capable of co-reacting to form an abrasion resistant coating on the optical element. The invention also provides a method of forming an abrasion resistant coating on an optical element, such as an ophthalmic lens. The method includes the steps of coating the optical element with a relatively rigid multifunctional monomer and a relatively flexible difunctional monomer, and polymerising the coating to form an abrasion resistant coating on the optical element.

Abstract: The present invention provides a method for manufacturing a photochromic article having a photochromic compound containing layer. The method includes the step of coating a casting face of at least one mould section with a photochromic host layer. The photochromic host layer is treated to minimise damage during subsequent steps, and a mould is then assembled so that it includes the mould section having the photochromic host layer. The mould is then filled with a photochromic article monomer composition and the monomer composition is subsequently cured to form a photochromic article substrate adhered to the photochromic host layer. The photochromic compound is introduced into the photochromic host layer.

Abstract: The present invention involves the prescribing and/or dispensing ophthalmic lenses, such as progressive addition lenses, for a wearer. In one form of the invention lens usage information is obtained from a wearer and entered into a programmed computer. The programmed computer processes the lens usage information to provide a separate weighted lifestyle score for each of one or more respective lifestyle score categories, such that each weighted lifestyle score is a function of a predetermined relationship between the respective lifestyle score category and at least ophthalmic lens design feature. The programmed computer then selects or designs an ophthalmic lens design using one or more of the weighted lifestyle scores such that the selected or designed ophthalmic lens has at least one lens design feature which has been customised using one or more of the weighted lifestyle scores.

Abstract: The present invention provides a method for tinting an optical substrate. The method includes the steps of applying a coating composition containing: • a polymerisable monomer having a polyoxyalkylene backbone containing at least four contiguous oxyalkylene units, and • an abrasion resistant agent and/or a high crosslinking polymerisable monomer to the optical substrate, polymerizing the coating composition to form an abrasion resistant coating layer, and introducing a tinting compound into the coating layer to thereby tint the optical substrate. The invention also provides a coating composition and an optical substrate that is tinted according to the method of the invention.

Abstract: The present disclosure provides a method of forming a removable protective coating on a hydrophobic surface of an ophthalmic lens element. The method includes providing an ophthalmic lens element having a hydrophobic surface. A non-aqueous coating composition is applied so as to coat at least part of the hydrophobic surface. The composition includes a film forming coating polymer and a compatible non-aqueous solvent. A substantial portion of the solvent is removed from the composition to form a removable protective coating on the ophthalmic lens element that adheres to the hydrophobic surface. The disclosure also provides a removable protective coating, and an ophthalmic lens element having the coating.