Bees see quite differently to humans. They have a set of compound eyes, which are comprised of thousands of elements called facets. Each worker bee has 6,900 facets that are colour sensitive. However, these facets only detect colours in the green-ultraviolet part of the electromagnetic spectrum, unlike humans who see in red, blue and green.
Unlike our own eyes, that focus light onto a an array of sensors much like a digital camera, each facet in a compound eye contains its own set of sensors. The images from the facets in the bees eye is combined to make an overall image in the bees brain.