The detailed characteristics of the red fluorescence of the human lens—that occurs at the seventh decade of life—is recognized as an example of evolutionary photobiomodulation for repair of the retina, and then used as a paradigm for extending current parametric values for reproducible photobiomodulation. The new photobiomodulation parameters involve relative intensities for wavelength bands within the range of 600 nm to 900 nm.

A laser protection lens includes a multilayer interference coating applied to at least one of an inside and an outside surface of an optically transparent material. The multilayer interference coating has a spectral filter profile with at least a 20 dB reduction of optical transmission for at least two different center wavelengths of lasers, while having a transmittance color difference greater than 40 ΔE.sub.Yu′v′ for discrimination color difference of red, green, and yellow indicator lights, and having spectral transmittance that passes light detected by l-cones of an eye, while attenuating light detected by m-cones and s-cones of the eye so as to improve visual acuity.

Some embodiments provide a lens including a lens body and an optical filter configured to attenuate visible light in certain spectral bands. At least some of the spectral bands can include spectral features that tend to substantially increase the colorfulness, clarity, and/or vividness of a scene. In certain embodiments, eyewear incorporates an optical filter that enhances chroma within one or more spectral bands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.

The optical product includes an optical multilayer film which is disposed on one surface or both surfaces of a base directly or via an intermediate film. The optical multilayer film is obtained by alternately disposing an SiO.sub.2 layer and a ZrO.sub.2 layer, forming nine layers in total, such that a first layer counting from the base is the SiO.sub.2 layer. The optical thickness of the SiO.sub.2 layer as the first layer is not greater than 0.120×λ/4 when a design wavelength is λ (500 nm), the optical thickness of the ZrO.sub.2 layer as a second layer is not less than 0.400×λ/4, the optical thickness of the SiO.sub.2 layer as a third layer is not less than 0.230×λ/4, and the optical thickness of the SiO.sub.2 layer as a seventh layer is not less than 0.450×λ/4.

Disclosed is an apparatus and method for combating light sensitivity, or photophobia, for people with low vision. Both the apparatus and method filter particular wavelengths of light associated with photophobia. This filtering is achieved while maintaining a luminance that is acceptable to the user and that maintains contrast. The apparatus of the disclosure is a mechanical filter that can be applied over an electronic screen. The method utilizes software and a filtering module associated with either the CPU or GPU of a computer. The filtering module processes a video signal by eliminating certain targeted wavelengths of light.

The spectacle lens includes a lens substrate including a blue light absorbing compound, and a multilayer film including a metal layer having a film thickness of 1.0 nm to 10.0 nm, wherein a blue light cut ratio is 35.0% or more, an average reflectance in a wavelength range of 400 nm to 500 nm on an object-side surface obtained by measurement from the object side is in a range of 15.00% to 25.00%, and an average reflectance in a wavelength range of 400 nm to 500 nm on an eyeball-side surface obtained by measurement from the object side is less than 2.00%.

Embodiments disclosed herein include eyewear that provides controlled variable light attenuation and color enhancement based on an input received from a user, a sensor and/or a signal from a control circuit. In some embodiments, the eyewear includes an optical filter system with two or more defined filter states that are adapted to improve color vision in different environments. The optical filter system can be incorporated into a lens having any desired curvature, including, for example, cylindrical, spherical or toroidal. The lens can include one or more functional components. Examples of functional components include color enhancement filters, chroma enhancement filters, a laser attenuation filter, electrochromic filters, photoelectrochromic filters, variable attenuation filters, anti-reflection coatings, interference stacks, hard coatings, flash mirrors, anti-static coatings, anti-fog coatings, other functional layers, or a combination of functional layers.

Embodiments disclosed herein include eyewear that provides controlled variable light attenuation and color enhancement based on an input received from a user, a sensor and/or a signal from a control circuit. In some embodiments, the eyewear includes an optical filter system with two or more defined filter states that are adapted to improve color vision in different environments. The optical filter system can be incorporated into a lens having any desired curvature, including, for example, cylindrical, spherical or toroidal. The lens can include one or more functional components. Examples of functional components include color enhancement filters, chroma enhancement filters, a laser attenuation filter, electrochromic filters, photoelectrochromic filters, variable attenuation filters, anti-reflection coatings, interference stacks, hard coatings, flash mirrors, anti-static coatings, anti-fog coatings, other functional layers, or a combination of functional layers.

An optical filter for eyewear and other viewing devices improves response to certain amber and red spectral emissions particularly from amber and red LEDs, without materially reducing appearance and discernment of pertinent items and signals present during driving activity, utilizes a narrow bandpass light filter in a “tuned” manner to pass portions of the visible spectrums of amber and red LED emissions to a high degree, while simultaneously reducing, but not effectively eliminating transmission of out-of-band spectral light. As a result, the amber and red LED emissions (signal) are selectively emphasized and out-of-band transmittance of background light (noise) are attenuated, thereby increasing the signal-to-noise ratio of the amber and red LED light sources found in traffic signals and vehicles. To a lesser degree, the same effect is achieved for filtered, amber and red incandescent sources as well.

A sunglass using a transparent, pixelated, liquid crystal (LC) two-dimensional array, or functionally equivalent technology, in possible combination with optical materials to selectively attenuate or block the Sun or its reflection from the field of view (FOV) of the person wearing the glasses is disclosed. An imaging camera located within the sunglasses detects the Sun, with software determining its position via centroiding algorithms. The Solar position is then translated, and, if necessary, rotated, scaled and skewed for the appropriate pixels in the left and right lens of the sunglass, where left eye and right eye “circles” are created to block or attenuate the Sun's image from the person wearing the glasses. Additionally, the sunglass lens will have protection against the Sun's ultra-violet (UV) rays. The internal power source may be either replaceable, or charged by solar or standard methods.