What Does a fly eye actually look like?Are they colourblind?

Question

ive seen lots of articles and information that's different!

1 says that flies can see a lot of images of 1 image!
and the other says they can see different images in each lens!!

WHICH ONE?

Answer 1

Flies have compound eyes.

A compound eye is a visual organ found in arthropods such as insects and crustaceans. It consists of one to thousands of ommatidia which are tiny independent photoreception units that consist of a cornea, lens, and photoreceptor cells which distinguish brightness and color. The image perceived by the arthropod is a combination of inputs from the numerous ommatidia, which are oriented to point in slightly different directions. Compared with single-aperture eyes, compound eyes have poor image resolution; however, they possess a very large view angle and the ability to detect fast movement and, in some cases, the polarization of light.

The 2nd site below has a great article about these types of eyes.

Answer 2

As Jerduen said, a fly's eye is a compound eye, made up of thousands of lenses, each terminating in a nerve cell (compared to the human eye, which has one lens, but thousands of nerve cell receptors on the retina at the rear of the eye).
Therefore, each lens in the fly'e eye can indeed see a separate image; whereas our eyes interpret the thousands of nerve impulses as one image. One advantage for a small insect like a fly is that the lenses can sense movement very quickly, which is a defense mechanism. That's why it is hard to swat a fly with a rapid movement.
(Hint: if you want to swat a fly, move the swatter very slowly towards the fly, and it will not sense it; then WHAP! when close and too late for the fly to escape You can quite easily flick a fly with your thumb and finger in this way, provided your initial approach is slow enough).

Answer 3

Most adult flies are active during the day and rely on their eyes for survival. The compound eyes of flies are large and are composed of thousands of individual lenses, up to 4000 in the case of the house fly. In some species, the compound eyes take up almost the entire head. Fly eyes are very sensitive to sudden movement and some species have very accurate three dimensional vision, such as the robber flies, which grab their prey while in flight. Most flies also have small, simple eyes near the top of the head, probably used to detect light intensity..