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1. WO2021144820 - CONTACT LENS

Note: Text based on automatic Optical Character Recognition processes. Please use the PDF version for legal matters

[ EN ]

CLAIMS

1. Contact lens (10) made of non-hydrophilized material, characterized in that it comprises a plurality of micro-protuberances (13) disposed so as to be facing toward the eye, during use, and configured to contact the corneal epithelium so as to raise said lens (10) by a few micrometers with respect to the corneal surface.

2. Contact lens (10) as in claim 1, characterized in that it comprises an internal zone (11), smooth and facing toward the eye, during use, which extends within a visual diameter (Dv), smaller than an external diameter (De) of said contact lens (10), and a peripheral zone (12), disposed outside the internal zone (11), annular in shape, which extends between the visual diameter (Dv) and the external diameter (De).

3. Contact lens (10) as in claim 2, characterized in that the micro protuberances (13) are made only in correspondence with said peripheral zone (12).

4. Contact lens (10) as in any claim hereinbefore, characterized in that the micro-protuberances (13) have a base (14) and a top (15), are integrated in a single body with the lens, and have a configuration that is cylindrical, truncated-cone, ellipsoidal, paraboloid or prismatic in shape.

5. Contact lens (10) as in claim 4, characterized in that the micro-protuberances (13) have a cylindrical or truncated-cone shape, and the top (15) defines a convex-shaped contact surface with the eye, conformed as a curved surface having a radius of curvature (Rb3, Rb4) comprised between 30 pm and 13,000 pm, preferably equal to about 500 pm.

6. Contact lens (10) as in any claim hereinbefore, characterized in that the micro-protuberances (13) are characterized by a height (HI, H2, H3, H4), which extends from their base (14) toward the top (15), comprised between 5 pm and 25 pm.

7. Contact lens (10) as in claim 4, characterized in that the cylindrical-shaped micro-protuberances (13) have a base diameter (D3) comprised between 5 pm and 250 pm.

8. Contact lens (10) as in claim 4, characterized in that the truncated cone-shaped micro-protuberances (13) have a base diameter (D4) comprised between 7 pm and 255 pm.

9. Contact lens (10) as in claim 4, characterized in that two micro protuberances (13), one immediately next to the other, having a cylindrical or truncated-cone shape, have a pitch (p2), understood as the radial distance between their respective centers, comprised between 30 mih and 500 mih.

10. Contact lens (10) as in any claim from 2 to 9, characterized in that said micro-protuberances (13) are homogeneously distributed over the entire internal surface of said peripheral zone (12), for example according to a geometric pattern defined by a plurality of rows which radially depart from the center of the lens, the totality of said micro-protuberances (13) occupying at least 20% of the area corresponding to the development of said peripheral zone (12), preferably a portion comprised between 35 and 50% of said area.

11. Contact lens (10) as in any claim hereinbefore, characterized in that it comprises within the peripheral zone (12) a plurality of holes (16), having a diameter comprised between 3 mhi and 20 mih, preferably equal to 10 pm, and being made on the surface of the lens in positions such as to be interposed between different micro-protuberances (13) disposed in the vicinity.

12. Contact lens (10) as in any claim hereinbefore, characterized in that it has a medium/low surface contact angle, comprised between 10° and 60°.