Hema viewed a certain object and found that it is not clearly visible to her. It was found that the image was formed by his eye lens 3 cm away from the pupil of his eye. Hema can correct this defect in her vision by using

Explanation

Since the distance between the pupil and the retina. is 2.3 cm and the image is formed at a distance of 3 cm from the pupil, it is obvious that the image is formed behind the retina. To correct this defect in vision, Hema needs to use a convex lens. As shown in the diagram, this would help in the formation of the image at the retina.