List two causes of Hypermetropia. (b) Draw ray diagrams showing (i) a hypermetropic eye and (ii) its correction using suitable optical device.

Draw a ray diagram to show a myopic eye.

Noopur needs a lens of power-4.5 D for correction of her vision. Draw ray diagrams showing the (a) defected eye and (b) correction for this defect.

When do we consider a person to be myopic and hypermetropic? Explain using diagrams how the defects associated with myopic and hypermetropic eye can be corrected?

When do we consider a person to be myopic or hypermetropic? Explain using diagrams how the defects associated with myopic and hypermetropic eye can be corrected?

When do we consider a person to be myopic or hypermetropic ? List two causes of hypermetropia. Explain using ray diagrams how the defect associated with hypermetropic eye can be corrected

Draw the ray diagrams to show the defective eye and the corrected eye for long sightedness.

(a) What is myopia? State the two causes of myopia. With the help of labelled ray diagrams show (i) the eye defect myopia (ii) correction of myopia using a lens. (b) Why is the normal eye unable to focus on an object placed within 10 cm from the eye?

Draw a labelled diagram of eye .

Draw a ray diagram to show image formation by a concave lens.