Anything that occurs outside the point of fixation i.e., anywhere you are concentrating your vision is happening in your peripheral vision. There are three ranges of peripheral vision far peripheral, mid-peripheral and near-peripheral. The categorization is done on the basis of distance from the visual field.
Human peripheral vision is comparatively weaker than other animals. This is due to the number of gangelion cells in the retina is and low at the edges. However any motion in the peripheral vision is easier to notice because of Magno cells.
