A method comprising: molding a first blank body (120, 310, 510, 600, 925) and a second blank body (130, 320, 520, 625, 930), including molding respective step structures (126, 136, 314, 324, 516, 524, 654) of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930), wherein the step structure of the first blank body (120,310,510,600,925) extends to the two opposing sides of the first blank body; forming an optical combiner structure at one of the respective step structures (314, 324, 516, 524, 654) of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930); bonding the first blank body (120, 310, 510, 600, 925) to the second blank body (130, 320, 520, 625, 930) to form a lens blank; coupling the lens blank to one or more blocking structures, wherein respective molded surface portions of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930) are mated to one another within the lens blank, wherein the step structure (126, 314, 516, 654) of the first blank body (120, 310, 510, 600, 925) couples to the step structure (136, 324, 524) of the second blank body (130, 320, 520, 625, 930) to form a stepped interface, and wherein the step structure (126, 314, 516, 654) of the first blank body (120, 310, 510, 600, 925) extends to include, at a first side of the first blank body (120, 310, 510, 600, 925), an exterior step structure which forms part of an exterior of the lens blank; forming an eyepiece (710, 810, 920) from the lens blank, including: machining the first blank body (120, 310, 510, 600, 925) to expose a first surface; depositing a filler material on part of the first side of the first blank body (120, 310, 510, 600, 925) prior to the machining the first blank body (120, 310, 510, 600, 925); polishing the first surface; and deblocking an assembly including a remaining portion of the lens blank. molding a first blank body (120, 310, 510, 600, 925) and a second blank body (130, 320, 520, 625, 930), including molding respective step structures (126, 136, 314, 324, 516, 524, 654) of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930), wherein the step structure of the first blank body (120,310,510,600,925) extends to the two opposing sides of the first blank body; forming an optical combiner structure at one of the respective step structures (314, 324, 516, 524, 654) of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930); bonding the first blank body (120, 310, 510, 600, 925) to the second blank body (130, 320, 520, 625, 930) to form a lens blank; coupling the lens blank to one or more blocking structures, wherein respective molded surface portions of the first blank body (120, 310, 510, 600, 925) and the second blank body (130, 320, 520, 625, 930) are mated to one another within the lens blank, wherein the step structure (126, 314, 516, 654) of the first blank body (120, 310, 510, 600, 925) couples to the step structure (136, 324, 524) of the second blank body (130, 320, 520, 625, 930) to form a stepped interface, and wherein the step structure (126, 314, 516, 654) of the first blank body (120, 310, 510, 600, 925) extends to include, at a first side of the first blank body (120, 310, 510, 600, 925), an exterior step structure which forms part of an exterior of the lens blank; forming an eyepiece (710, 810, 920) from the lens blank, including: machining the first blank body (120, 310, 510, 600, 925) to expose a first surface; depositing a filler material on part of the first side of the first blank body (120, 310, 510, 600, 925) prior to the machining the first blank body (120, 310, 510, 600, 925); polishing the first surface; and deblocking an assembly including a remaining portion of the lens blank. machining the first blank body (120, 310, 510, 600, 925) to expose a first surface; depositing a filler material on part of the first side of the first blank body (120, 310, 510, 600, 925) prior to the machining the first blank body (120, 310, 510, 600, 925); polishing the first surface; and deblocking an assembly including a remaining portion of the lens blank.