[icoder]

Does your less invasive solution work with fully locked in patients? Often these solutions rely (partially) on some tiny muscle activity still working, which they don't have. At least that was what I've been taught some time ago (could be early 2000s), and what's for sure hard to rule out in 'healthy' patients.

[lettergram]

It was developed for fully locked in patients, who have eye control. It uses a very similar mechanism except it’s slower. Effectively you have to look at characters on a screen to type.

[dundarious]

The article implies he has lost even eye-control, or at the very least, that he wanted the implant for use in that eventuality.