Chapter 14, Problem 5RAT

The glasses of a nearsighted person are usually thicker at

(a) middle.

(b) edges.

(c) Either of these.

(d) Neither of these.

To determine

The correct option for the statement “The glasses of a nearsighted person are usually thicker at.”

Answer to Problem 5RAT

The correct option for the statement “The glasses of a nearsighted person are usually thicker at” is option (b).

Explanation of Solution

The nearsightedness can be improved by the usage of glasses. Concave glasses are adapted for this. For these types of glasses, the edges will be thicker than that of the thinner center.

This gives the glass a concave shape and hence the name concave glass. They are utilized so as to decrease the focusing power of the eye. And hence, it is also known as "minus power lenses."

For a nearsighted eye, when the minus lenses are used, it moves the focus of the light, and it comes directly onto the surface of the retina. This shift adjusts the distance of blurry vision by restoring a clear vision.

Conclusion:

Therefore, the correct option for the statement “The glasses of a nearsighted person are usually thicker at” is option (b).