Study the diagram given below and answer the questions that follow : (i) Name the defect of vision depicted…
Study the diagram given below and answer the questions that follow :
(i) Name the defect of vision depicted in this diagram stating the part of the eye responsible for this condition.
(ii) List two causes of this defect.
(iii) Name the type of lens used to correct this defect and state its role in this case.
Solution
(a)
(i) Hypermetropia
Ciliary muscles/ eye lens
(ii) Focal length of the eye lens is too long.
Eyeball becomes too small.
(iii) Converging lenses/ convex lens
They provide the additional focussing power required for forming the image on the retina./ Helps to decrease the focal length of the eye lens.
