what is the vision of butterfly?

buttterflies are very nearsighted.while they can spot colour.they cannot recognise patterns.their vision is monocular.however nature has made up for this in other ways .some species of BF have a visual field of about 344 degrees on the horizontal plane -only 16 degrees short of seeing all the way around its body.and vertically a full o 360 degrees
the average human has a visual fieldof only 190 degrees.this widefield of vision helps protect them from predators ,particularly birds.
a study from arizon university by ecologist ron rutowski reporting.