| CPC G02B 7/12 (2013.01) [G02B 7/02 (2013.01); G02B 25/001 (2013.01)] | 17 Claims |

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1. A head-mounted device, comprising:
a head-mounted housing that surrounds an interior region;
first and second displays supported by the head-mounted housing, wherein each of the first and second displays is configured to display an image that is viewable from an eye box; and
a cover that hides the interior region from view, wherein the cover has first and second openings that are respectively aligned with the first and second displays, wherein the cover comprises first and second overlapping layers, wherein the first layer has gaps that face the eye box and that permit air to flow through the gaps and past the first and second displays to cool the head-mounted device, and wherein the air flows through the gaps along a direction that is perpendicular to a user-facing surface of the first and second displays.
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