Have a look at the posture of this girl, who is reading a book and answer the following question. Which are the two conditions shown in section A and section B of the eye is applicable to her.

A-Normal eye, B-Myopia The condition shown in section B is applicable to her. Myopia is the defect where light from the distant object forms an image before the retina and the image are blur. When concave lens is placed in front of the eye, it moves the image back onto the retina and makes the image clear. The two possible reasons for this defect is eyeball is lengthened from front to back or the lens is too curved. Hypermetropia or far-sightedness can be corrected by wearing convex lens.

The figure given below shows the principal part of the human ear. Study the diagram and answer the following questions: Why is it harmful to use a sharp object to remove ear wax? Mention the number and name of the part involved.

Pinna collects the sound waves and sends them to the eardrum or tympanum through the ear canal. These incoming sound waves cause the tympanic membrane to vibrate. Therefore, if we use any sharp object to remove ear wax, there is a chance that it may injure the eardrum or tympanic membrane and rupture it, which can impair hearing. Thus, it is advisable not to use any sharp object inside the ear canal. The part of the ear which any sharp object can harm is the eardrum or tympanic membrane, which is labelled as 2 in the given diagram.