Title:
METHOD FOR MANUFACTURING ALL TYPES OF RIGID GAS PERMEABLE CONTACT LENSES
Document Type and Number:
WIPO Patent Application WO/2021/191657
Kind Code:
A1
Abstract:
A method for manufacturing of all types of rigid gas-permeable (RGP) contact lenses : scleral, corneoscleral and corneal lenses and preferably-orthokeratologic lenses by new controlled programmed bending technology and prolonged stamping technology using initially softened workpiece profile preferably made from oxygen (preferably high oxygen) permeability material and special mold press forms; comprising: designing the two-side lens mold bondage concave-convex press forms; preliminary preparing RGP lenses by initial cutting the polymer workpiece button into multiple plane round state pieces or plates with specified predefined diameter and thickness, processed edges, dual-side polishing, and using mold press forms of special design for controlled programmed bending of pretreated reversible softened initial rigid workpiece RGP material profile and pretreatment stage, i.e., softening -is achieved through modifying/changing the modulus of elasticity of initially rigid polymer RGP workpiece by using chemical method and chemical compound or compounds.
Inventors:
GILIA ANDREI (RU)
Application Number:
PCT/IB2020/052713
Publication Date:
September 30, 2021
Filing Date:
March 23, 2020
Export Citation:
Assignee:
GILIA ANDREI (RU)
International Classes:
B29D11/00; B29C43/00; B29C59/00; B29C67/00
Foreign References:
| US5141677A | 1992-08-25 | |||
| US20080315444A1 | 2008-12-25 | |||
| US20190270264A1 | 2019-09-05 |
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