First slide

The optical instruments

Question

A person suffering from 'presbyopia' (myopia and hyper metropia both defects) should use

Moderate

A

A concave lens
B

A convex lens
C

A bifocal lens whose lower portion is convex
D

A bifocal lens whose upper portion is convex

Solution

A bifocal lens consist of both convex or concave lenses with lower part is convex. It focuses the light from a point in front of the retina backwards so it falls on the surface of the retina which is necessary for image formation and processing in the eye.

Get Instant Solutions

When in doubt download our app. Now available Google Play Store- Doubts App

Recieve an sms with download link

Doubts App

OR

SCAN ME

Doubts App

Doubts App