Question

different types of lenses used for correcting the eye defects

Answer 1

biconcave
biconvex
the answer will be this

Answer 2

Answer:

Eye defects:-

→ Eye defects means there is defect in focusing incident light rays on retina.

Some Common eye defects are :-

→ Hypermetropia

• Also known as Far sightedness.
• Corrected by Convex Lens

→ Myopia

• Also known as Short sightedness.
• Corrected by Concave Lens

→ Astigmatism

• Also known as Multiple Meridians.
• Corrected by Cylindrical Lens.

→ Presbyopia

• Also known as Old Age Hypermetropia.
• Corrected by Bifocal Lens.