When do we consider a person to be myopic or hypermetropic ? List two
causes of hypermetropia. Explain using ray diagrams how the detect
associated with hypermetropic eye can be corrected.
Answers
Explanation:
A person is considered to be myopic if he/ she can see nearby objects but is unable to see distant object. A person is said to hypermetropic, if the person is not able to see nearby objects but can see distant objects.
The myopia defect can be corrected with the help of concave lens of suitable power
Explanation:
A person suffering from myopia or near-sightedness can see nearby object but cannot see distant (far off) objects distinctly.
In a myopic eye, the image of a distant object is formed in front of the retina and not at the retina itself. To correct a myopic eye,person has to use spectacle of concave lens.
A person suffering from hypermetropia or far sightedness can see distant object but cannot see nearby object distnctly. In a hypermetropic eye, the image of a nearby object is formed behind the retina and not at the retina itself. To correct a hypermetropic eye,the person has to use spectacles of convex lens
