There is provided an optical insert for transforming conventional eyewear into eyewear having an additional purpose. The optical insert comprises an extender portion which holds a lens on a first end and a mounting assembly on a second end opposite the first end. The mounting assembly comprises a profile which matches the profile of the conventional eyewear lens retainer. The lens of the conventional eyewear is configured to be removed and replaced with the optical insert. In one embodiment, the lens of the optical insert can comprise dark lenses which can be useful, for example, to transform conventional eyeglasses into prescription sunglasses.

A head-mounted display apparatus includes a display unit, a support portion configured to support the display unit, and a cover member is removably provided to the support portion. The cover member includes a contact portion that is positioned on a facing surface facing the support portion and that comes into contact with the support portion, and a first protruding portion that is positioned on the facing surface and that protrudes toward the support portion to be inserted into the support portion. At least one of the cover member and the support portion includes a magnet that attracts the other one by a magnetic force. The contact portion and the first protruding portion are provided on an inner side with respect to an outer edge of the cover member when the cover member is viewed in the direction opposite to the first direction.

A head-wearable spectacles device for determining one or more gaze-related parameters of a user is disclosed. In one example, the device includes a spectacles body having a middle plane and configured for being wearable on a user's head, and at least a left and a right ocular opening, wherein both ocular openings define a bounding cuboid having an upper surface, a lower surface, a left lateral surface, and a right lateral surface. The upper surface of the bounding cuboid is oriented perpendicular to the middle plane of the spectacles body.

A head-wearable spectacles device for determining one or more gaze-related parameters of a user is disclosed. In one example, the device includes a spectacles body having a middle plane and configured for being wearable on a user's head, and at least a left and a right ocular opening, wherein both ocular openings define a bounding cuboid having an upper surface, a lower surface, a left lateral surface, and a right lateral surface. The upper surface of the bounding cuboid is oriented perpendicular to the middle plane of the spectacles body.

An eyeglass lens replacement assembly is revealed. A limiting slot is formed on each side of a frame and a limiting stopper is arranged in the limiting slot. A temple pivot member is mounted in the limiting slot. A lens is mounted to a lens connection portion of the frame and two sides of the lens are inserted into insertion slots of the temple pivot members. Each side of the lens is provided with a positioning dent which is locked with a positioning bulge of the insertion slot. A limiting bulge of a positioning portion pivoted on the temple pivot member is limited in a limiting notch of the lens while a locking recess of the positioning portion is locked and positioned by an inner wall surface of the insertion slot. Thereby the frame, the temple pivot members and the lens are combined with and connected to one another firmly.

An eyeglass lens replacement assembly is revealed. A limiting slot is formed on each side of a frame and a limiting stopper is arranged in the limiting slot. A temple pivot member is mounted in the limiting slot. A lens is mounted to a lens connection portion of the frame and two sides of the lens are inserted into insertion slots of the temple pivot members. Each side of the lens is provided with a positioning dent which is locked with a positioning bulge of the insertion slot. A limiting bulge of a positioning portion pivoted on the temple pivot member is limited in a limiting notch of the lens while a locking recess of the positioning portion is locked and positioned by an inner wall surface of the insertion slot. Thereby the frame, the temple pivot members and the lens are combined with and connected to one another firmly.

A shade attachment for sunglasses; the shade attachment includes a shade body, and a looped-section defining a sleeve having a first opening and a second opening configured to receive and retain arms of the sunglasses. The shade attachment for sunglasses is useful for providing shade and preventing sun exposure to the neck, head and facial area of the user.

A shade attachment for sunglasses; the shade attachment includes a shade body, and a looped-section defining a sleeve having a first opening and a second opening configured to receive and retain arms of the sunglasses. The shade attachment for sunglasses is useful for providing shade and preventing sun exposure to the neck, head and facial area of the user.

The invention relates to an adapter means (1) for the view panel (4) of a pair of goggles or a helmet visor, wherein the adapter means (1) comprises a bar-shaped edge element (5) with a first support surface (6) for supporting an outer panel (2) and a second support surface (7) for supporting an inner panel (3), wherein the support surfaces (6, 7) are not parallel to one another. The invention further relates to a view panel (4), a pair of goggles and a helmet.

A composite protective sheet material for covering a smooth surface of a transparent material, especially but not exclusively for covering the surface of a lens. It comprises a film substrate at least one main surface of which is covered by an adhesive coating. At least a part of the said at least one main surface of the substrate is free or substantially free of adhesive, or has less adhesive applied to it than does the rest of that surface, thereby to provide a finger lift region of the film at an edge of the surface covered thereby.