Checker shadows Edward Adelson illusion shadows Ponzo illusion parallel lines depth perception monocular cues blog High Resolution high resolution Impossible object blivet widget devils fork visagraph results strabismus reading Happy Holidays Research poster ARVO 2019 paul harris sco professor od product product shot vivid vision home vivid vision home default events rift vr rift headset facebook vr headset facebook rift rift Vivid Vision VR vision therapy see vividly vr vision therapy Vision therapy tool vision care tool vision therapy device amblyopia vision treatment Seevividly vision care device ken nichols intern covd demo manish gupta gesture tracking logo small the verge press buzz media tuan tran portrait advisor james blaha blaha ceo clinical optometry cafe wall illusion geometricaloptical markdown reference github robert conference northwestern congress diplopia seevividly Michigan State special Olympics circle Vivid Vision Clinical Virtual Reality Vision therapy data page stats watercolor illusion chromaticity luminance color contrast optometrist dr nate betsy yaros Vivid Vision Optometry zach fuchs ucsf study virtual reality vision therapy stereo sue fixing my gaze susan barry vision therapy tool vision care dev Hering illusion geometrical optical Ewald Hering Skip Rift Setup wired time time magazine the huffington post tech crunch fast company cnbc engadget Hardware eric medine head shot team Simultaneous Contrast Illusion monochrome gradated horizontal bar alan decorte john drake john games game design vive vr vive headset htc vive vr htc vr htc vive Illusory Motion fixation jitter visual cortex rotsnake knowledge base launcher breaker Manish Gupta Virtual reality vision therapy Amblyopia treatment eye banner research poster Cindy Ho SRC Melbourne See Vividly VR Vision therapy background backgdrop base in base out vergence accommodation color colors color scheme success story testimonial lazy eye shumaker rising star optometry treatment plan vivid vision clinical retina diagram visual system screenshot blog header vision care d happy holidays Vivid Vision Small Circle Logo Transparent featured doctor UVEA UVEA Mediklinik Vivid Vision Europe pc box art MC Escher Waterfall depth proximity VR exercise VR bike bundle dr paul harris media coverage customer success customer support jordan jordan braunstein cris miranda social media marketing cris James Blaha vrvt apollo vr ben backus science advisor