Helmet-mounted display

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Notion

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Science and technology

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What Wikipedia says

In aviation, a helmet-mounted display (HMD) is a head-worn device that uses digital displays and optics to project imagery and/or symbology to the wearer's eyes. It provides visual information to the user where head protection is required – most notably in military aircraft.

Excerpt from the Wikipedia article “Helmet-mounted display”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: US Army, Public domain, via Wikimedia Commons.