Contact lenses that, like certain IR 3d glasses, simply darken and lighten, in order to facilitate three-dimensional displays. This would be useful in an urban environment, and a simple, near-future step towards augmented reality. As a bonus, or as a selling point for Nvidia, or whomever, the lenses could double as polarized sunglasses....-- cloudface, Sep 07 2009 Augmented Reality Rundown http://spectrum.iee...in-a-contact-lens/0Brief description of (futuristic) variety of contact lens suggested here... [cloudface, Sep 07 2009] Articles on EngadgetHD tagged Autostereoscopic http://www.engadget...g/AutoStereoscopic/ [anamba, Sep 08 2009] Autostereoscopy on Wikipedia http://en.wikipedia...iki/Autostereoscopy [anamba, Sep 08 2009] An iPhone case http://www.engadget...available-to-order/ [anamba, Sep 08 2009] Actually in the near future (or the present, if you can afford it) you won't need special eyewear/headgear to use a 3-D display. See the links I just posted for further research.
That said, I would still like to have contact lenses that can turn into sunglasses on command. Just not for 3-D displays... the alternate polarization method used in movie theaters necessarily makes the picture half as bright, which is no good.-- anamba, Sep 08 2009 //This would be useful in an urban environment//How so?-- coprocephalous, Sep 08 2009 This would make a cool Hollywood hacking premise: hack the sync-signal for the contact lenses so both go dark at the same time for subliminal durations allowing stuff to happen 'in plain sight' of someone.-- loonquawl, Sep 08 2009 random, halfbakery