Constant efforts to make head-mounted displays (HMDs) more compact and low-power consumption have naturally led to the idea of integrating them into contact lenses. Mojo Vision was the first company to take on this ambitious challenge, though with limited success. While enabling technologies, particularly in the micro-display sector, are advancing rapidly, it remains essential to understand the fundamental optical constraints, including those related to retinal physiology, in order to identify the most viable path forward. In this work, we review and evaluate the main eligible projection approaches used in HMDs, especially in Augmented Reality (AR) and Head-Up Display (HUD) systems, and consider how these concepts could be adapted to contact lenses with a greatly reduced form factor while maintaining comparable functionality.
Jean Louis de Bougrenet de la Tocnaye (Mon,) studied this question.