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. A non-ophthalmic system comprising:
a fluorescent light source or an LED light source; and
a selective light transmission filter configured to block 5-50% of light transmission at each wavelength in a selected wavelength range of 400-460 nm and has an average light transmission of at least 80% in the wavelength range of 460-700 nm, wherein the non-ophthalmic system exhibits a yellowness index of no more than 15.
2. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises at least one of: a dye and a pigment.
3. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises one or more of: perylene, porphyrin, coumarin, acridine, and derivatives thereof.
4. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises perylene or a derivative thereof.
5. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises porphyrin or a derivative thereof.
6. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises a synthetic or a non-synthetic pigment.
7. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises at least one of: melanin, lutein, and zeaxanthin.
8. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter comprises one or more dyes having a molecular structure and in concentrations that mimic the transmission spectra of perylene, porphyrin, coumarin, acridine, or derivatives thereof.
9. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter is a component of a film.
10. The non-ophthalmic system of claim 1 , further comprising a color-balancing component.
11. The non-ophthalmic system of claim 1 , wherein the selective light transmission filter is configured to transmit at least 80% of light having all wavelengths in the range between 460-700 nm.
12. The non-ophthalmic system of claim 11 , wherein the selective light transmission filter is configured to transmit at least 80% of light having all wavelengths in the visible spectrum outside of the selected wavelength range.
13. The non-ophthalmic system of claim 12 , wherein the selective light transmission filter is configured to block 5-50% of light transmission at a selected wavelength range of 420-440 nm.
14. A non-ophthalmic system comprising:
a fluorescent light source or an LED light source; and
a selective light transmission filter configured to selectively filter 5-50% of light transmission at each wavelength in a range of blue light wavelengths that includes 430 nm, wherein the non-ophthalmic system exhibits a yellowness index of no more than 15, and wherein the non-ophthalmic system has an average transmission of at least 80% across the visible spectrum.
15. The non-ophthalmic system of claim 14 , wherein the non-ophthalmic system has a transmittance spectrum, wherein the transmittance spectrum has a first minimum value at a wavelength between 410 nm and 450 nm, wherein the transmittance spectrum has a first maximum value at a wavelength that is less than the wavelength of the first minimum value, and wherein the transmittance spectrum has a second maximum value at a wavelength that is greater than the wavelength of the first minimum value.
16. The non-ophthalmic system of claim 14 , further comprising an ultraviolet filter and/or an infrared filter.