General knowledge

I have heared that fly has 10000 eyes.is it true??

most likely not? im not sure. lol. but I think it's dragonfly, but they dont have 1000 eyes instead 1000 vision.

No. It has two compound eyes. Im still confused on what a compound eye is but here is an excerpt from an article:

One of the very earliest identifying features of insects is the compound eye, found only among the insects, the centipedes, the crustaceans, and the horseshoe crabs. The compound eye is composed a large number (generally a few hundred to thousands) of facets, each of which faces a slightly different direction than its neighbours. Each facet records a general impression of the colour and intensity of the light which comes from the direction in which it faces, but does not produce a complete image. Every facet is bound by is own optic nerve to the insect's brain and contributes one spot of light to the image, much as the pixels (picture elements) in the monitor in front of you are doing now or tiles do in a mosaic. The quality of the picture which an insect sees is determined by the resolution (number of facets) of its eyes, as is the case with a computer monitor. Shapes are much more clearly defined on a 1024x768-pixel monitor than are equal size shapes on a 320x240-pixel monitor. Most insects can see fairly well to a few feet, but not much beyond that. The farther away that an object is, the fewer facets that it covers and the poorer the resolution of the object. The compound eye system does not require and cannot incorporate a mechanism for focusing. The clarity or fuzziness of the image is determined by the number of facets, which is fixed, in the eye and by the insects distance from the object. The sequence of bee head below show, from left to right, the way a human sees a bee's head, the way a bee might see the same head from a short distance away, and the way a bee might see it from farther away.

a fly has a compound eye unlike ours it has thousands of individal light rciptors so they have two campound eyes but thousands of light reciptors.