optical illusion High Resolution chart snellen acuity visual acuity logo vivid vision visagraph results strabismus reading visual system headache blurry vision double vision trouble reading learning vision lazy eye convergence insufficiency vision therapy Hering illusion geometrical optical Ewald Hering manish manish gupta cto James Blaha Vivid Vision Seevividly vrvt diplopia apollo vr Simultaneous Contrast Illusion monochrome gradated horizontal bar blog success story testimonial reading problem phone amblyopia eye patch esotropia exotropia eye surgery crossed squint cross eyed anisometropia strabismus surgery eye muscles converging optometrists near me sleepy product product shot home vivid vision home BABO optometry gift clinical update Vision therapy student western university college of optometry knowledge base launcher retina diagram arvind gupta advisor portrait high resolution sosventures research poster ARVO 2019 Cindy Ho virtual reality vision therapy amblyopia treatment vr Vision therapy tool vision care tool vision therapy device vision treatment tuan tran od Alan Purdy Game Engine Expert hypertropia vergence disorders divergence excess strabismic refractive oculus quest quest bundle games ring runner software vision care device childrens vision eyeglasses james blaha svvr Testimonial Manish Gupta Virtual reality vision therapy Amblyopia treatment screenshot eye banner default refractive amblyopia headaches car sickness eyestrain patching vivid field zeiss event panel startups innovation binocular vision disorder eye patching preview hoopie game small vividly aware newsletter dr david maze chicago vision therapy stereovision 3d vision strabismic amblyopia markdown reference github certified provider vivid vision provider vision therapy doctor iheartvt 2020 conference virtual conference ben backus science advisor optometrist oculus rift hmd head mounted display covd cris miranda techcrunch press buzz media computer leap motion xbox controller touchscreen treatment plan vivid vision clinical John Drake Lead Game Designer robert featured doctor sports vision athletics visual performance Ken Nichols Director of Customer Support Susan Barry Stereo Sue pc box art touch controller right replacement dan fortenbacher dan fortenbacher fcovd wow vision michigan colorful CE Mark Europe Regulation Cranial nerve Ocular Motor nerve headset cv1 VividVision spotlights clinic spotlights Ben Backus Chief Science Officer importance of eye exams Oculus Rift Orange Blue Light header blaha ceo