A head-mounted apparatus, comprising: an eyepiece (202; 302A, 302B; 502; 702) comprising a dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803); and a frame mounting the eyepiece (202; 302A, 302B; 502; 702) so that, during use of the head-mounted apparatus, a user side of the eyepiece faces towards a user of the head-mounted apparatus, and a world side of the eyepiece opposite the first side faces away from the user, wherein the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) is configured to selectively modulate an intensity of light transmitted parallel to an optical axis from the world side of the eyepiece to the user side of the eyepiece during operation of the head-mounted apparatus, characterized in that the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) comprises: a layer of a liquid crystal; a circular polarizer arranged on the user side of the liquid crystal layer; and a linear polarizer on the world side of the liquid crystal layer. and in that the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) is configured to selectively modulate the intensity of light based on: - detected light information corresponding to intensity of light from one or more objects, said light information including a plurality of spatially-resolved light values, and/or - detected gaze information corresponding to an eye of a user of the head-mounted apparatus; and/or - detected image information corresponding to a virtual image projected onto the eyepiece, said detected image information including one or a plurality of brightness values. an eyepiece (202; 302A, 302B; 502; 702) comprising a dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803); and a frame mounting the eyepiece (202; 302A, 302B; 502; 702) so that, during use of the head-mounted apparatus, a user side of the eyepiece faces towards a user of the head-mounted apparatus, and a world side of the eyepiece opposite the first side faces away from the user, wherein the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) is configured to selectively modulate an intensity of light transmitted parallel to an optical axis from the world side of the eyepiece to the user side of the eyepiece during operation of the head-mounted apparatus, characterized in that the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) comprises: a layer of a liquid crystal; a circular polarizer arranged on the user side of the liquid crystal layer; and a linear polarizer on the world side of the liquid crystal layer. and in that the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) is configured to selectively modulate the intensity of light based on: - detected light information corresponding to intensity of light from one or more objects, said light information including a plurality of spatially-resolved light values, and/or - detected gaze information corresponding to an eye of a user of the head-mounted apparatus; and/or - detected image information corresponding to a virtual image projected onto the eyepiece, said detected image information including one or a plurality of brightness values. a layer of a liquid crystal; a circular polarizer arranged on the user side of the liquid crystal layer; and a linear polarizer on the world side of the liquid crystal layer. and in that the dynamic dimming assembly (203; 303A, 303B; 503; 603; 703; 803) is configured to selectively modulate the intensity of light based on: - detected light information corresponding to intensity of light from one or more objects, said light information including a plurality of spatially-resolved light values, and/or - detected gaze information corresponding to an eye of a user of the head-mounted apparatus; and/or - detected image information corresponding to a virtual image projected onto the eyepiece, said detected image information including one or a plurality of brightness values. - detected light information corresponding to intensity of light from one or more objects, said light information including a plurality of spatially-resolved light values, and/or - detected gaze information corresponding to an eye of a user of the head-mounted apparatus; and/or - detected image information corresponding to a virtual image projected onto the eyepiece, said detected image information including one or a plurality of brightness values.