Back to results
US 12,330,187 B2Granted
UV-overprotecting iridescent colored contact lenses
AssigneeThe University of Akron
InventorsAli Dhinojwala, Saranshu Singla
Life of this patent
Estimating the term…
Abstract
In various embodiments, the present invention is directed to contact lenses that utilize a multilayer coating of alternating high RI materials, such as melanin or polydopamine (PDA) and other low RI materials to create tunable iridescent colors and contain melanin or similar materials that impart photoprotection due to their broadband UV-vis absorption spectrum and ability to quench radicals.
Claims22
An ultra-violet (UV) light protective contact lens comprising:
- a translucent lens portion that is sized to fit on the front of an eye;
- and
- a translucent iridescent coating comprising a plurality of alternating low refractive index (RI) and high RI layers adhered to said translucent lens portion;
- wherein the difference between the RI of the high RI layers and the low RI layers of said translucent iridescent coating is from about 0.2 to about 0.7;
- wherein each of said low RI and high RI layers reflect light in the visible spectrum and said iridescent coating produces one or more iridescent colors by the constructive interference of the light reflected by said low RI and high RI layers, and
- wherein one or more of said high RI layers absorbs UV light.
3 more elements
An iridescent UV protective coating secured to a contact lens comprising:
- a plurality of alternating low refractive index (RI) and high RI layers, the difference between the RI of said high RI layers and said low RI layers being from 0.2 to 0.7
- wherein each of said low RI and high RI layers reflect light in the visible spectrum and said iridescent coating produces one or more iridescent colors by the constructive interference of the light reflected by said low RI and high RI layers, and
- wherein one or more of said high RI layers absorbs UV light.
Dependencies are inferred from the claim text.