It is possible to project directly into the retina: http://www.engadget.com/2013/10/09/avegant-retinal-hmd/ http://www.engadget.com/2013/10/09/avegant-retinal-h

It is possible to project directly into the retina: http://www.engadget.com/2013/10/09/avegant-retinal-hmd/ http://www.engadget.com/2013/10/09/avegant-retinal-hmd/ Definitely dangerous but I see a lot of potential in the technology with the possibility of true retina quality resolution.