[vacri]

So you're saying that humans have laser-like accuracy in the horizontal dimension, and sloppy accuracy in the vertical? Your interpretation of the science is poor.

[demallien]

I don't know how you get that interpretation from the parent post. Only having to worry about one degree of freedom in your movement is much easier / faster than having to manage two.

[vacri]

In the example, the user doesn't have to make a horizontal adjustment at all - the cursor conveniently stops right on target.