An eye shielding device for improving clarity in a moist environment includes a frame that is configured to position on a head of a user. A panel is coupled to the frame so that the panel is positioned over eyes of the user for shielding the eyes. The panel, which is substantially transparent, comprises an inner layer that is coupled to an outer layer so that the inner layer, the outer layer, and a perimeter of the panel define an interior space. A power module is coupled to the frame. A heating element is coupled to the panel and is positioned in the interior space. The heating element is selectively operationally couplable to the power module so that the power module is positioned to power the heating element to heat air that is in the interior space to drive moisture from exterior surfaces of the panel.

An eye-protective shade for the Augmented Reality (AR) smart glasses is provided, including: an eye protection unit disposed in front of the AR smart glasses, wherein the eye protection unit is disposed with a pair of shading portions capable of filtering light, and the pair of the shading portions respectively correspond to a pair of semitransparent display portions disposed on the AR smart glasses, and the pair of shading portions are made of translucent material and/or opaque material; when reading digital information by use of the eye-protective shade along with the AR smart glasses, the eye-protective shade protects the user's eyeballs and the macula from direct light radiation while the peripheral retina is continuously in contact with external light sources. The present disclosure can change the user's reading habits and moderate visual fatigue when reading.

An eye-protective shade for the Augmented Reality (AR) smart glasses is provided, including: an eye protection unit disposed in front of the AR smart glasses, wherein the eye protection unit is disposed with a pair of shading portions capable of filtering light, and the pair of the shading portions respectively correspond to a pair of semitransparent display portions disposed on the AR smart glasses, and the pair of shading portions are made of translucent material and/or opaque material; when reading digital information by use of the eye-protective shade along with the AR smart glasses, the eye-protective shade protects the user's eyeballs and the macula from direct light radiation while the peripheral retina is continuously in contact with external light sources. The present disclosure can change the user's reading habits and moderate visual fatigue when reading.

Apparatus and methods are described including a corrective optical element having a thickness and/or a curvature that is different in different regions of the corrective optical element, such that the corrective optical element is configured, upon being adhered to any one of a plurality of differently-shaped optically-corrective single-vision lenses, to change a focal length of the optically-corrective single-vision lens differently in different regions of the optically-corrective single-vision lens. The corrective optical element is shapeable such that the corrective optical element can conform with a shape of any one of the plurality of differently-shaped optically-corrective single-vision lenses. Other applications are also described.

Apparatus and methods are described including a corrective optical element having a thickness and/or a curvature that is different in different regions of the corrective optical element, such that the corrective optical element is configured, upon being adhered to any one of a plurality of differently-shaped optically-corrective single-vision lenses, to change a focal length of the optically-corrective single-vision lens differently in different regions of the optically-corrective single-vision lens. The corrective optical element is shapeable such that the corrective optical element can conform with a shape of any one of the plurality of differently-shaped optically-corrective single-vision lenses. Other applications are also described.

An eyewear device having a frame positionable to a removable engagement with any of a plurality of lens assemblies. Each lens assembly has shoulders at opposing ends which slidably engage within respective shoulder slots formed into the body of the frame. A biased ball having a portion extending into one or both shoulder slots, biasly contacts into a ball cavity depending into a respective shoulder to maintain the lens assembly in the removable engagement.

An eyeglass lens piece (10) configured for both forward and rearward viewing by a user comprises at least one curved transparent section extending in front of, above, between and below the user's eyes and a distance laterally from the sides of said user's eyes to the approximate sides of the user's head, a housing (11) arranged at an edge in the lower section (12) of the lens piece (10), projecting from the lens piece, and a mirror (15) arranged in the housing in a position offset from the curved transparent section.

A head-mounted device may have a display that displays computer-generated content for a user. The head-mounted device may have an optical system that directs the computer-generated image towards eye boxes for viewing by a user. The optical system may be a see-through optical system that allows the user to view a real-world object through the optical system while receiving the computer-generated image or the optical system may include a non-removable lens and a removable vision correction lens through which an opaque display is viewable. The optical system may include a removable lens. The removable lens may serve as a custom vision correction lens to correct for a user's vision defects. The optical system may have a projection bias lens that places computer-generated content at one or more desired virtual image distances and a corresponding compensation bias lens.

Apparatus and methods are described including generating a multi-focal lens and/or a progressive lens by adhering a corrective optical film to an optically-corrective single-focal lens, such as to change a focal length of the single-focal lens differently in different regions of the single-focal lens. Other applications are also described.

Apparatus and methods are described including generating a multi-focal lens and/or a progressive lens by adhering a corrective optical film to an optically-corrective single-focal lens, such as to change a focal length of the single-focal lens differently in different regions of the single-focal lens. Other applications are also described.