telescope
The lens in the eye flexes to focus light from different distances on the retina.
The radial and circular muscles of the iris.
Binocular
The human eye.
The sun emits visible light most strongly, which is the type of light that is visible to the human eye.
Yellow-green is most sensitive to the human eye.
there is only one iris color of the cow witch is black. The cow eye only has 4 muscles so it will not be able to move its eye around to much like us humans.The cow eye is also much bigger and darker than the regular human eye. The cow eye is also the most similar eye type to the humans eye
myopia
The cornea is the part of the human eye that bends light rays the most when focused on a distant object.
I think a pinhole camera is similar to the human eye because like the pinhole camera when it sees something it reflects the image but it is an inverted image. With the human eye the brain corrects it and turns it the right way up. The pinhole cameras image is not corrected because it does not have a lens.
The size of a human eye is the size of a golfball.But most of the eye is inside your head.The size of an eye of an average person will never change. If you want more detail or information go to http://wikipedia.com/eyes or you can read the book called "The human body".
Nothing? Burning at most.