Complex sentence: According to this explanation, the cyclops was originally simply a giant or ogre, much like Humbaba in the "Epic of Gilgamesh"; the detail about it having one eye was simply invented in order to explain how the creature was so easily blinded.
Split into simpler sentences: According to this explanation, the cyclops was originally simply a giant or ogre, much like Humbaba in the "Epic of Gilgamesh". The detail about it having one eye was simply invented in order to explain how the creature was so easily blinded.