An apparatus comprising: a see-through display (105a; 105b; 119; 713a; 713b; 717a; 717b); a first optical component (121a; 701); and a second optical component (121b; 703); wherein each of the first optical component and the second optical component is a dynamic focus component whose focal point settings can be dynamically changed to alter their focus; and the apparatus further comprises at least one processor and at least one memory configured to: determine a focus distance of a user, wherein the focus distance corresponds with a distance of the object from the see-through display to a point in the user's field of view through the see-through display that is a point of attention of the user, wherein an object is at the point of attention; determine a representation (107; 507; 513) of data; cause presentation of the representation on the see-through display; adjust focus of the first optical component that is positioned between the see-through display and the user such that a focus distance of the representation (111; 509; 515) is reduced; and adjust focus of the second optical component that is positioned between the see-through display and the object such that a perceived distance of the object moves to the actual distance of the object from the see-through display when viewed through the see-through display, and such that the representation is presented as overlaid on the object; characterised in that at least one of the optical components comprises a fluidics-based dynamic focus component; and/or wherein at least one of the optical components comprises a lens-system with focusing capability based on piezoelectric movement of at least one lens. a see-through display (105a; 105b; 119; 713a; 713b; 717a; 717b); a first optical component (121a; 701); and a second optical component (121b; 703); wherein each of the first optical component and the second optical component is a dynamic focus component whose focal point settings can be dynamically changed to alter their focus; and the apparatus further comprises at least one processor and at least one memory configured to: determine a focus distance of a user, wherein the focus distance corresponds with a distance of the object from the see-through display to a point in the user's field of view through the see-through display that is a point of attention of the user, wherein an object is at the point of attention; determine a representation (107; 507; 513) of data; cause presentation of the representation on the see-through display; adjust focus of the first optical component that is positioned between the see-through display and the user such that a focus distance of the representation (111; 509; 515) is reduced; and adjust focus of the second optical component that is positioned between the see-through display and the object such that a perceived distance of the object moves to the actual distance of the object from the see-through display when viewed through the see-through display, and such that the representation is presented as overlaid on the object; determine a focus distance of a user, wherein the focus distance corresponds with a distance of the object from the see-through display to a point in the user's field of view through the see-through display that is a point of attention of the user, wherein an object is at the point of attention; determine a representation (107; 507; 513) of data; cause presentation of the representation on the see-through display; adjust focus of the first optical component that is positioned between the see-through display and the user such that a focus distance of the representation (111; 509; 515) is reduced; and adjust focus of the second optical component that is positioned between the see-through display and the object such that a perceived distance of the object moves to the actual distance of the object from the see-through display when viewed through the see-through display, and such that the representation is presented as overlaid on the object; characterised in that at least one of the optical components comprises a fluidics-based dynamic focus component; and/or wherein at least one of the optical components comprises a lens-system with focusing capability based on piezoelectric movement of at least one lens.