Abstract: A lens cover includes a cap adapted to be pivotably supported on an optical device. A stop may be positioned to interfere with spring-driven movement of the cap and to brake the cap at an intermediate position between closed and open positions thereof, and to allow the cap to be manually moved to the fully open position. An optional detent structure is disclosed for releasably retaining the cap in its open position. A mounting ring assembly of the lens cover may include a first threaded ring member for attachment to the optical device and a second ring member rotatably coupled to the first ring member for positioning a hinge that pivotably attaches the cap to the second ring member. Magnets may be included to retain the cap in the closed position. The mounting ring assembly, the cap, or both may be formed of a metal such as aluminum.

Abstract: A lens cover includes a cap adapted to be pivotably supported on an optical device. A stop may be positioned to interfere with spring-driven movement of the cap and to brake the cap at an intermediate position between closed and open positions thereof, and to allow the cap to be manually moved to the fully open position. An optional detent structure is disclosed for releasably retaining the cap in its open position. A mounting ring assembly of the lens cover may include a first threaded ring member for attachment to the optical device and a second ring member rotatably coupled to the first ring member for positioning a hinge that pivotably attaches the cap to the second ring member. Magnets may be included to retain the cap in the closed position. The mounting ring assembly, the cap, or both may be formed of a metal such as aluminum.

Abstract: A snap-fit holder for a lens or optical element includes an annular collar having a shoulder supporting the optical element and a sleeve that extends from the shoulder around and beyond the optical element. An annular retaining member includes a skirt fitted into the sleeve and pressed against the optical element opposite the shoulder. The skirt may include an outwardly projecting lip that snaps into a groove or notch formed in an inner surface of the sleeve to secure the retaining member to the collar and maintain a clamping force against the optical element. A resilient insert may be interposed between the optical element and either the collar or retaining member to provide a reaction force that tends to bias the collar and retaining member apart. Also disclosed are stacked kits of holders and an eye guard riflescopes and the like, to protect a user from recoil-related eye injury.