The illustration above is a concept image showing what it would look like with the lens displaying a digital overlay of the letter E.

上面的插图是一幅概念图片，显示了戴上这种眼镜会看到的情景：画面上叠加了一个字母E。

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Microsoft has also filed a patent for a set of digital glasses that overlay information on top of the user's view, which it suggested could be used at sports matches and theatres.

BBC: Details of Google's Project Glass revealed in FCC report