Where is the image formed in the human eye?

The image in the human eye is formed on the retina. The retina is the innermost layer of the eye, located at the back, and it contains photoreceptor cells (rods and cones). When light enters the eye and passes through the cornea and lens, it is focused onto the retina. The photoreceptor cells in the retina then detect light and convert it into electrical signals that are transmitted to the brain through the optic nerve.

Hence, the correct option is the retina.