CBSE
Class 10
Class 12
Hypermetropia (Far sightedness)
Causes of Hypermetropia
Correction
Use of convex lens of suitable power can correct the defect.
Hypermetropia (Far sightedness)
Causes of Hypermetropia
Correction
Use of convex lens of suitable power can correct the defect.
Myopia (Nearsightedness)
Causes of Myopia
Correction
Use of concave lens of appropriate power.
(a) In a myopic eye, image of distant object is formed in front of the retina (and not on the retina)
(b) The far point (F) of a myopic eye is less than infinity
(c) Correction of myopia. The concave lens placed in front of the eye forms a virtual image of the distant object at far point (F) of the myopic eye.
Presbyopia (Old age Hypermetropia)
Causes
Correction