Question

( A person cannot read newspaper placed nearer than socm from his eyes. Name the def defect of visionhe is suffering from. Draw a raydiagram to illustrate this defect List its two possible causes, praw a ray diagram to show this defect may be corrected using a lens of appropriate focal length​

Answer 1

Answer:

If a person cannot read a newspaper placed nearer than $50cm$, this means that the near point of his eye has increased from normal $\left( \approx 25cm \right)$ and he cannot focus the light rays from an object near than that onto the retina properly. This defect of vision is known as hypermetropia or far-sightedness.

Explanation:

If a person cannot read a newspaper placed nearer than $50cm$, this means that the near point of his eye has increased from normal $\left( \approx 25cm \right)$ and he cannot focus the light rays from an object near than that onto the retina properly. This defect of vision is known as hypermetropia or far-sightedness.