For a human eye, where u is the distance of an object from the eye, f is the focal length of the lens and v is the distance of image from the eye, which is the correct schematic graph ?

- For the human eye, the image distance (v) is fixed (distance to the retina). - The eye lens changes its focal length (f) to focus objects at different distances (u). This process is called accommodation. - As the object distance (u) increases, the focal length (f) required to focus the image on the retina increases. - The lens formula is 1/f = 1/v + 1/u. With v constant, f is a function of u.