What kind of lens is there in our eyes? 

The cornea of the human eye has a curved surface and creates genuine pictures. The light is concentrated to the pupil, where it strikes the eye's lens. The retina at the rear of the eye will be struck by this focussed light ray, creating a true picture.
The human eye functions like a convex lens and only ever creates true images. Real pictures are generated when light is focused on the retina at the back of the clear, convex nature of the human lens and the cornea, which cover the eye.

Only a few components in the human eye, which is a tremendously intricate organ, are crucial for creating a true image. The outside of the front eyeball is covered with the cornea, a thin, transparent membrane. Because it has a curved surface, the cornea functions like a convex lens. It starts to concentrate the light beams. The light rays strike the end of the eye after passing through the pupil. The lens, which is likewise convex, sharpens light even more so that it will strike the retina at the rear of the eye. At this point, the retina communicates the information to the brain, allowing us to view the image.

Hence, the correct answer is option B.