what are saccades?
Saccades are the rapid movement of eyes that is used while scanning a visual scene.
Eye movement
Saccades are the rapid movement of eyes that is used while scanning a visual scene. 
where are cranial nerves 1 and 2 located In the cerebrum what is its anatomy? The cerebrum is the largest part of the brain; The cerebrum consists of two C-shaped cerebral hemispheres, separated  by a longitudinal fissure. what are its main function? It functions as the center of sensory perception, memory, thoughts and judgement; the cerebrum also functions as the center of voluntary motor activities. how are there named? The cerebral cortex, Cerebral hemispheres are they named based on their functions? Yes -  the right celebral hemisphere controls and processes signals from the left side of the body, while the left celebral hemisphere controls and processes signals from the right side of the body. what are the functions nerves 1 and 2 (mentioned in the beginning)? The olfactory nerves (I) transmit nerve impulses about odors to the central nervous system.  The optic nerves (II) transmits visual information from the retina to the brain. what are the other nerves that perform other functions? The oculomotor nerve (III), trochlear nerve (IV) and abducens nerve (VI) coordinate eye movement. The trigeminal nerve (V) provide sensation to the skin of the face and also controls the muscles of chewing. The facial nerve (VII) controls most muscles of facial expression etc what are the neuroanatomy involved in eye movement? The oculomotor nerve, which controls the majority of the muscles, the trochlear nerve, which controls the superior oblique muscle, and the abducens nerve, which controls the lateral rectus muscle.
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Eye movement [SEP] Saccades
The eyes are never completely at rest: they make frequent fixational eye movement even when fixated at one point. The reason for this movement is related to the photoreceptors and the ganglion cells. It appears that a constant visual stimulus can make the photoreceptors or the ganglion cells become unresponsive; on the other hand a changing stimulus will not. So the eye movement constantly changes the stimuli that fall on the photoreceptors and the ganglion cells, making the image clearer. Saccades are the rapid movement of eyes that is used while scanning a visual scene. In our subjective impression, the eyes do not move smoothly across the printed page during reading.