Question

what down the function of different parts of human eye

Answer 1

Made of many working parts, the human eye functions much like a digital camera. Here's how it works. Light enters the eye through thecornea, the clear front surface of the eye, which acts like a camera lens. Theiris works much like the diaphragm of a camera--controlling how much light reaches the back of the eye.

Answer 2

first cornea is the protective layer second retina is the screen on which image is formed on retina crystalline lens which makes real and inverted image on the retina 4th pupil that controls the amount of light entering the human eye Iris is a muscular diagram and responsible for the characteristic colour of the human eye