It's only me or it does not explain how it works?

> the technology [...] can be separated into two parts. First [...]

is the part that tracks eye movements and what they are focusing on.

The second part is never written. There is a hint later on:

> [the] prototype lenses, made up of layers of liquid crystal and a transparent ITO (indium tin oxide) conductive layer. This combination is still incredibly thin, and it was amazing to watch the layers switch almost instantly into a prescription lens