Method of locally thickening an ophthalmic lens

• Main Authors: MOINE JEROME, SAHLER JEAN
• Format: Patent
• Language: English
• Published: 16.12.2015
• Subjects: CONTACT LENSES; OPTICS; PERFORMING OPERATIONS; PHYSICS; PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCESIN A PLASTIC STATE; SPECTACLES; SUNGLASSES OR GOGGLES INSOFAR AS THEY HAVE THE SAME FEATURESAS SPECTACLES; TRANSPORTING; WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL

Method implemented by computer means for determining an ophthalmic lens adapted to a wearer and to a spectacle frame, the method comprising: a wearer data providing step (S1), during which wearer data comprising at least the wearer's ophthalmic prescription is provided, a mounting data providing step (S2), during which mounting data is provided, the mounting data comprising at least the tie points of the ophthalmic lens to be mounted in the spectacle frame, a thickness requirement data providing step (S3), during which thickness requirement data is provided, the thickness requirement data comprising the minimum thickness of the ophthalmic lens at the tie points so as to be mounted in the spectacle frame, an ophthalmic lens data determining step (S4), during which ophthalmic lens data is determined based on the wearer data, the ophthalmic lens data comprising at least the two optical surfaces of the ophthalmic lens and the relative positions of the two optical surfaces of the ophthalmic lens, an oversize creating step (S5), during which the ophthalmic lens determined during the ophthalmic lens data determining step is locally thicken by creating an oversize at the tie points, the oversize being determined so that the thickness of the ophthalmic lens at the tie points is greater than or equal to the minimum thickness.