Abstract: 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.

Abstract: Embodiments comprise a lens for an eyewear. The lens includes an optical filter. A transmittance spectral profile of the optical filter includes a saddleback transmission valley having a local maximum transmittance, a first minimum transmittance, and a second minimum transmittance. The local maximum transmittance of the transmittance valley is positioned at a first wavelength from about 570 nm to about 600 nm. A difference in transmittance between the first minimum transmittance and the local maximum transmittance is less than 5%.

Abstract: Embodiments comprise an eyewear having a lens, the lens having an optical filter. A transmittance spectral profile of the optical filter comprises a transmission valley having a minimum transmittance with a spectral bandwidth, wherein the minimum transmittance of the transmittance valley is positioned at a first wavelength from about 450 nm to about 475 nm; and the spectral bandwidth, equal to the full width of the transmittance valley at the minimum transmittance plus 30%, is less than or equal to about 30 nm.

Abstract: 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.

Abstract: A method of supporting a body part (16), comprising providing a device (100) comprising: a first portion (105) configured to support a body part, wherein, in use, the body part applies a first pressure to the first portion in a first direction; means for detecting the first pressure; and a second portion (115) having means (212) for applying a second pressure to the body part in a second direction substantially perpendicular to the first direction; detecting the first pressure; determining the second pressure based on a user parameter; and applying the second pressure to the body part in the second direction at a pre-determined ratio relative to the first pressure using said means for applying the second pressure.

Abstract: 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 hands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.

Abstract: 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 hands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.

Abstract: 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 hands. In some embodiments, a wearer of the eyewear can perceive the increase in chroma when viewing at least certain types of scenes.

Abstract: 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.

Abstract: 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.

Abstract: A completion arrangement and methods of using the completion arrangement are described herein. The completion section includes a completion section and impacting formations. The completion section is arranged to be coupled to production tubing, and has means to allow hydrocarbons to pass therein from reservoir rock in which the wellbore is formed. The impacting formations are drivingly moveable relative to the wellbore. The means being arranged to serve as flushing portals, whereby drilling fluid introduced into the production tubing is arranged to flow via the means into a space between the production tubing and the wellbore, and circulate in the space and the impacting formations. One, or both, of the drilling fluid circulating in the space and the impacting formations are arranged to remove obstructing material and formations from the wellbore for return to surface by way of the space, during insertion of the completion arrangement into the wellbore.

Abstract: The present invention provides a flow restrictor coupling (10) and a method of forming a flow restrictor coupling. The flow restrictor coupling (10) comprises a hollow tubular member (12) having at a first end thereof first means for engagement with an end of a first pipe and, at a second end thereof, second means for engagement with an end of a second pipe, wherein said hollow tubular member (12) is arranged to couple said first pipe to said second pipe and to provide for fluid communication therebetween, said flow restrictor coupling (10) further being arranged to present at least one aperture (26) in a wall of said hollow tubular member between said first and second ends, the aperture (26) having selectively variable dimensions for control of fluid flow therethrough.