Noopur needs a lens of power -4.5D for correction of her vision.
- What kind of defect in vision is she suffering from?
- What is the focal length and nature of the corrective lens?
- Draw ray diagrams showing the (a) defected eye and (b) correction for this defect.
- What are the causes of this defect?
b) f = -1/4.5 = 0.22 cm
i) Due to excess curvature of eye lens
ii) Elongation of the eye ball