Best to read what's put in front of you. Apple's work predates Google's by years.
Also note a subtle detail: Glass addresses ONE eye. This addresses TWO eyes. See the difference?
As others have noted, the two devices have next to nothing in common, except for being head mounted.
Google Glass is an Android computer in a headset with a single display that's out of the user's main sight line, and a trackpad, along with voice control and communications/control with your phone.
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This patent is for the design of a goggle-like device that the user puts directly over their eyes to privately view games / movies, etc, and which specifically has movable displays to better custom fit each user. The patent is not about what you do with it. It's
only about the physical mount itself.
Here's what the patent specifically claims as its primary inventive idea:
Claim 1: "A head-mounted display, comprising: a spacer operative to receive at least one component of the head-mounted display; an outer cover coupled to the spacer, the outer cover forming at least a portion of an outer surface of the head-mounted display; at least one optical module movably coupled to the spacer, substantially enclosed by the outer cover, and operative to be displaced along at least two axes and in rotation around at least one axis with respect to the spacer without moving the outer cover with respect to the spacer."