The near point and the far point of a child are at 10 cm and 100 cm. If the retina is 2.0 cm behind the eye-lens, what is the range of the power of the eye-lens?

An object placed 10 cm in front of a lens has an image 20 cm behind the lens. What is the power of the lens ( in dioptres ) ?

The near and far points of a person are at 40 cm and 250cm respectively. Find the power of the lens he/she should use while reading at 25cm . With this lens on the eye, what maximum distance is clearly visible?

The near and far points of a person are at 40 cm and 250cm respectively. Find the power of the lens he/she should use while reading at 25cm . With this lens on the eye, what maximum distance is clearly visible?

The near and far points of a person are at 40 cm and 250cm respectively. Find the power of the lens he/she should use while reading at 25cm . With this lens on the eye, what maximum distance is clearly visible?

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?

The far point of a myopic person is 80 cm in front of the eye. What is the nature and power of the lens required to correct the problem?