So "standard" AR glasses normally use reflective lenses (think like a two way mirror) and a separate lcd screen. This is most obvious in something like the Met

So "standard" AR glasses normally use reflective lenses (think like a two way mirror) and a separate lcd screen. This is most obvious in something like the Meta2: imagine you started with a ballcap, used double sided tape to attach a smartphone to the bottom of the rim (touching your eyebrows and screen pointed down), lastly attach a reflective piece of plastic from the forward edge of the brim angling down to around your nose. Or just look at pictures of it here (though they are all cleverly angled to not show the eyebrow screen): https://www.metavision.com/ https://www.metavision.com/ The resulting image is both digital (from the LCD) and the reality of what you're seeing around you, but by necessity it's dimmer and the digital screen images look more translucent. The promise of MagicLeap and lightfield projection is that you can get a fundamentally much more solid looking image by directly projecting light into your eye (with no intermediary lenses), though it's unclear exactly how much of this is happening in the current MagicLeap developer release. It's not a perfect analogy, but it's the difference between looking at a computer screen with and without some tinted sunglasses, or a couple of 2 way mirrors between you and your monitor.