Doug Lanman's Abstract for a Near-Eye Lightfield HMD, Doug was at NVIDIA at the time of Publication Now he is at Oculus/Facebook

Figure 1: Enabling thin, lightweight near-eye displays using light field displays. (Left) Our binocular near-eye display prototype is shown, comprising a pair of OLED panels covered with microlens arrays. This design enables a thin head-mounted display, since the black box containing driver electronics could be waist-mounted with longer OLED ribbon cables. (Right) Due to the limited range of human accommodation, a severely defocused image is perceived when a bare microdisplay is held close to the eye. Conventional near-eye displays require bulky magnifying optics to facilitate accommodation. We propose near-eye light field displays as thin, lightweight alternatives, achieving comfortable viewing by synthesizing a light field for a virtual scene located within the accommodation range (here implemented by viewing a microdisplay, depicting interlaced perspectives, through a microlens array)

https://research.nvidia.com/sites/default/files/publications/NVIDIA-NELD_0.pdf