S10 - Eye Problems

Bifocal lens or progressive lens is used to correct this defect.

• myopia

• hypermetropia

• cataract

• presbyopia

This problem arises due to foggy or cloudy lens .

• presbyopia

• myopia

• cataract

• hypermetropia

What is myopia?

• near-sightedness

• far-sightedness

• caused by cloudy or foggy lens

• long-sightedness

How can near sightedness be corrected?

• by sing concave lens

• by using convex lens

• by using bifocal lens

• by using cylindrical lens

How can hypermetropia be corrected?

• by using concave lens

• by using convex lens

• by using bifocal lens

• by using cylindrical lens

All causes of myopia, EXCEPT _____.

• long focal length

• short focal length

• elongated eyeball

• high converging power

A child is not able to read letters in the book clearly and has to keep the book far away to read it clearly. The child is suffering from

• Myopia

• Hypermetropia

• Presbyopia

• Astigmatism

This defect is caused due to elongation of eye ball.

• Myopia

• Hypermetropia

• Presbyopia

• Astigmatism

Bifocal lens is used to correct this defect.

• Myopia

• Hypermetropia

• Cataract

• Presbyopia

Which of the following is true about Hyperopia?

• It can be corrected by using a convex lens

• It may arise when focal length of eye lens is too long

• Light rays converge behind the retina

• (all of these)