Contact lens

G - Physics – 02 – C

Patent

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Details

G02C 7/04 (2006.01) B23K 26/00 (2006.01)

Patent

CA 2068314

To improve its gas-permeability, a contact lens, which may be of any normal material. even a gas-impermeable material such as polymethylmethacrylate, is microperforated with 66000 holes distributed in equispaced sectors leaving unperforated the central (optically important) part and the outermost rim of the lens. With a smaller hole size, some one million holes can be accommodated. In a modification. some or all of the holes go only part way through the thickness of the contact lens.

Pour améliorer sa perméabilité aux gaz, la lentille de contact décrite, qui peut être fabriquée à partir de n'importe quelle matière normale, même une matière imperméable aux gaz tels que le polyméthylméthacrylate, est percée de microperforations constituant 66 000 trous répartis dans des secteurs équidistants et laissant la partie centrale (optiquement importante) et la bordure externe de la lentille non perforée. En prévoyant des trous plus petits, leur nombre peut être d'un million environ. Dans une variante, une partie ou la totalité des trous pénètrent seulement partiellement dans l'épaisseur de la lentille de contact.F@ @R@

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