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The high CPK levels indicate muscle damage in the body which could be associated with nystagmus
as well. It could be part of muscle dystrophy
diseases and he needs to be evaluated thoroughly by the Paediatrician and possibly by Genetics counsellor. There could be risk of kidney
problems due to the muscle damage which also needs to be looked into. He needs to be well hydrated and he should consume balanced diet rich in fresh fruits and green leafy vegetables.