“People experience 3-D virtual reality through glasses and contact lenses that beam images directly to their retinas, and these direct-eye displays are the primary means by which people read documents.”

Ray KurzweilThought Leader

Inventor and futurist, author of The Age of Spiritual Machines

Retinal-projection glasses and display contact lenses were not commercially available in 2019; VR headsets used conventional panels and were owned by a small minority, while reading was overwhelmingly done on phone, tablet, e-reader and laptop screens.