How does the eye work?
Eye works like a camera.The part of eye which senses the light is retina & there is a thin layer of nerve cells at the very back of eye.But in order to see clearly, we have to have an in focus image & that is where the cornea and the lens of eye come in.The cornea of eye is front window of eye & this does 2/3rd of focusing of light onto the retina.The final 1/3rd of focusing and also the zooming mechanism of eye are performed by the lens which is inside the eye.The lens is capable of moving & focusing at different distances & fine tuning the sharpness of image onto the surface of the retina.
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