Question

differentiate between myopia and hypermetropia on the the basis of the the change in the(a) focal (b) how can this be corrected​

Answer 1

Answer:

• Myopia is a Far sightness A person who suffer from myopia see nearby object clearly but cannot see a distant object..This was happen due change of focal...It is corrected by using a spectacles with suitable power
• hypermetropia issightnesightness a person who suffer from Hypermetropia can see a distant object clearly but cannot see a nearby object It is a corrected by using a spectacles with suitable power

Answer 2

Answer:

Myopia:-

• The defect of an eye in which it cannot see the distant objects clearly is called myopia.
• High converging power of the lens
• Eye-ball being too long. Due to the high converging of the eye-lens, the image is formed in front of the retina and a person cannot see clearly the distant objects.
• Myopia or short-sightedness can be corrected by wearing spectacles containing a concave lens.

Hypermetropia:-

• Hypermetropia or long-sightedness is a defect of an eye where a person cannot see nearby objects clearly. The near-point of the hypermetropic eye is more than 25 cm away.
• Low converging power of eye-lens.
• Eye-ball being too short. In the case of hypermetropia, the image of an object is formed behind the retina and therefore, a person cannot see clearly nearby objects.
• The condition of hypermetropia can be corrected by putting a convex lens in front of the eye.