> They expect to be able to look at an item without having the look cause an action to occur.
So this doesn't seem to be a problem that Vision Pro has?
Yeah, Apple Vision doesn't have this problem, because eye tracking is used just for pointing; not for clicking on items.
> some form of ‘‘clutch’’ to engage and disengage the monitoring
The paper does talk about other challenges with look-to-select, even if it is biased by the thinking of back in the day:
> Unlike a mouse, it is relatively difficult to control eye position consciously and precisely at all times.
You have to remember that the historical setting for much of this research was to help paralyzed people to communicate, and pushing a button or the modern pinch-touch was not really always an option.
I wanted to see how it is possible but sure enough, I found a paper from 1995 that cited even older research about this.
https://www.cs.tufts.edu/~jacob/papers/barfield.pdf