Question

Mani is a front bench student. She is unable to draw the picture drawn on the *****-board. She got permission from the teacher and sat in the back row.What could be the defect that Mani is suffering from ?Draw the diagram, which shows the correction of the above defect.

Answer 1

(i) In the case of hypermetropia, the rays coming from a nearyby object after refraction from the lens, forms an image beyond retina.

(ii) Let the point of minimum distance at which then ye lens forms clear image oe retina be known as near point.

(iii) The people with defect of hypermetropia cannot see objects placed between near point (H) and point of least distance of distinct vision (L).

(iv) Eye lens can form a clear image on the retina when any object is placed beyond near point.

(v) To correct hypermetropia, we need to use a lens which forms an image of an object beyond near point when the object is placed between near point (H) and least distance of clear vision (L)

So, we need a double convex lens.