Question

write a short note on defects of vision
5 marks ​

Answer 1

Answer:

Here is your answer , please thank and Mark brainliest.

Explanation:

There are mainly three common refractive defects of vision. These are (i) myopia or near-sightedness (ii) Hypermetropia or far – sightedness (iii) Presbyopia. Myopia is also known as near-sightedness. A person with myopia can see nearby objects clearly but cannot see distant objects distinctly.blindness and eye cancer are also the defects of vision.

Answer 2

Answer:

1) myopia:also known as near sightedness. a person suffering from myopia can see the near objects clearly but cannot see the far objects distinctly. the correction of myopia can be done by using concave lens of appropriate power

2)hypermetropia: it is also known as farsightedness a person suffering with hypermetropia can see distant objects clearly but cannot see nearby objects distinctly it can be corrected using the convex lens of appropriate power.

3) presbyopia :the power of accommodation of eye usually decreases the ageing . a person suffering from myopia can be corrected using a common type of bifocal lenses consists of both concave and convex mirror.