High performance selective light wavelength filtering providing improved contrast sensitivity
The present invention relates to ophthalmic systems and coatings comprising a selective light wavelength filter, wherein said selective filter provides improved contrast sensitivity.
1. An ophthalmic system comprising:
an ophthalmic component selected from the group consisting of spectacle lens, contact lens, intra-ocular lens (IOL's), corneal grafts, corneal inlays, corneal onlays, and electro-active lens; and
a filter,
wherein the system limits the transmission of light of blue wavelengths in a wavelength range of 430+/−10 nm by at least 10%,
wherein white light has CIE (x,y) coordinates of (0.33+/−0.05, 0.33+/−0.05) when transmitted through the system, and
wherein the total average transmission of the system in the visible spectrum is greater than 90%.
2. The system of claim 1 , wherein the wavelength range is 430+/−20 nm.
3. The system of claim 1 , wherein the wavelength range is 430+/−30 nm.
4. The system of claim 1 , wherein the ophthalmic component includes prescription or non-prescription lenses.
5. The system of claim 1 , wherein the system limits the transmission of light in the wavelength range by at least 20%.
6. The system of claim 1 , wherein the system limits the transmission of light in the wavelength range by at least 30%.
7. The system of claim 1 , wherein the system limits the transmission of light in the wavelength range by at least 40%.
8. The system of claim 1 , wherein the system limits the transmission of light in the wavelength range by at least 50%.
9. The system of claim 1 , wherein white light has CIE (x,y) coordinates of (0.33+/−0.03, 0.33+/−0.03) when transmitted through the system.
10. The system of claim 1 , wherein the system exhibits a yellowness index of no more than 15.
11. The system of claim 1 , wherein the filter is absorptive.
12. The system of claim 1 , wherein the filter is reflective.
13. The system of claim 1 , wherein the filter is a combination of reflective and absorptive.