Complex sentence: Moths' eyes have an unusual property: their surfaces are covered with a natural nanostructured film which eliminates reflections, allowing the moth to see well in the dark, without reflections to give its location away to predators.
Split into simpler sentences: Moths' eyes have an unusual property: their surfaces are covered with a natural nanostructured film which eliminates reflections. This allows the moth to see well in the dark, without reflections to give its location away to predators.