Process, device and composite part for manufacturing a hybrid lens

A device (30) for manufacturing a hybrid contact lens (7) formed of a rigid central portion connected to a flexible peripheral portion by an adhesive material, starting from an oxygen-permeable rigid disk (2) and from a hydrophilic flexible disk (3), characterized in that the device comprises means (31) for cutting a concave surface on the hydrophilic flexible disk, means (31) for cutting a convex surface complementary to the concave surface on a rigid disk, means (32) for partially hydrating the hydrophilic disk to a defined first level of hydration, means (37) for assembling, by gluing, the two disks to form a composite part (1), means (40) for drying said composite part for a defined time sufficient to allow the dehydration of the flexible disk to a second defined level of hydration lower than the first, and means (41) for dry-cutting said composite part by turning and polishing, to give said hybrid lens.

A composite part (1) for manufacturing a hybrid contact lens (7, 21) formed of a rigid central portion (8, 12) connected to a flexible peripheral portion (9, 23) by an adhesive material (10, 24), characterized in that it comprises an oxygen-permeable rigid disk (2), forming a first layer, a hydrophilic flexible disk (3) hydrated to a first defined level of hydration, forming a third layer, and an adhesive bonding material (6) between first and third layers, forming a second, intermediate, bonding layer, and in that the first level of hydration is between 54% and 60%.