1) The human eye and camera both have convex lens which form real and inverted image.
2) Eye’s iris and the camera’s aperture both passes the amount of light and both change depending on lighting conditions.
3) Both Eye and the camera focus on single objects and on large images and capture large scapes.
4) The cornea of the eye is very similar to the lens of a camera, both sit and the front of the body, are both transparent and have a spherical curvature.
5) Camera and eye both capable of viewing different tones of grey and various shades of other colours. and also capable of seeing near and far, judging the size of different things, registering depth and capturing movement.