Final answer:
The three most common causes of noncomitant deviations in children are cranial nerve palsy, extraocular muscle dysfunction, and nystagmus.
Step-by-step explanation:
The three most common causes of noncomitant deviations in children are cranial nerve palsy, extraocular muscle dysfunction, and nystagmus. Cranial nerve palsy is often caused by damage to the nerves that control eye movement, such as the oculomotor nerve. Extraocular muscle dysfunction refers to problems with the muscles that control eye movement, which can be caused by weakness or tightness in these muscles. Nystagmus is a condition characterized by involuntary eye movements, which can be caused by neurological or genetic factors.