The term "motion blur" refers to antialiasing in the temporal dimension. All high quality CGI feature film work performs this, otherwise CGI imagery would look very unrealistic (esp at 24 fps). Not fully understanding temporal antialiasing was a major problem is early film special effects such as hand animated miniatures.
The methods of temporal anti-aliasing (motion blur) are the same as for the spatial dimensions. The most straight forward is to supersample at a higher temporal resolution (frame rate) and then downsample using some filter kernel (often just a box filter meaning all the in between frames are simply averaged) to the desired frame rate. You get better quality by increasing the number of samples and by using a better filter shape (such as a gaussian).
Aliasing gets its name from the fact that frequencies higher than the display frequency alias (take on another identity) as frequencies below the display frequency.
This means that spatial frequencies (rapid changes in image contrast) at resolutions higher than the display resolution alias to lower spatial frequencies and become visible. This is the same phenomena as the beat frequency from two separately occillating strings, tuning forks, etc. In that case, the two frequencies interfere to cause a third, low frequency beat. In the case of images, the spatial display frequency of the CRT screen (say 1280 pixels across) interferes with the spatial frequencies in the image (spatial patterns in textures, spatial patterns formed by triangle edges, etc.) and cause artifact "beat" frequencies. Thus, increasing the display resolution can never eliminate aliasing, only raise the frequency of the artifacts. You must antialias to remove aliasing. In the temporal case, raising the frequency of the frame rate can never remove temporal aliasing. Again it only increases the frequency of the temporal artifacts. You must antialias in the temporal dimension (use correct motion blur), to remove temporal aliasing.
Note that correct temporal antialiasing does not truly "blur" the image any more than correct spatial antialiasing blurs the image. In fact, the image actually appears much sharper, with more resolution than is actually being displayed. In the temporal case, this means a correctly motion blurred image actually appears to be running at a much higher frame rate than it actually is, with no flicker or jerkyness.
It does not depend on where the eyes are looking, any more than spatial antialiasing. It is applied to the whole image on each frame.