Question

Study the given diagram and answer the questions that follow:

1. Write the name of the eye defect shown in the diagram. Where is the image formed in this eye defect with respect to the retina of the eye?
2. List two causes of this eye defect.
3. With the help of a ray diagram, show how this defect of vision is corrected.

Answer 1

1. The diagram shows Myopia, also known as nearsightedness or short-sightedness. In this defect, the image of a distant object is formed in front of the retina rather than directly on it.
2. There are two reasons for this defect.
   • The curvature of the cornea and the eye lens increases. The muscles near the lens can not relax, so the converging power of the lens remains large.
   • The eyeball elongates so that the distance between the lens and the retina increases.
3.