Calculate the power of the eye-lens of the normal eye when it is focused at its (a) far point (infinity) and (b) near point(25 cm from the eye). Assume the distance of the retina from the eye-lens to be 2.5 cm.

What is the far point and near point of the human eye with normal vision ?

What happens to the image distance in the eye when we increase the distance of an object from the eye?

What happens to the image-distance in the normal eye, when we increase the distance of an object from the eye?

For normal eye vision what is the object distance and image-distance when the object is placed at a near point? (Take the distance between the eye lens and the retina as 2.3 cm.)

A myopic adult has a far point at 0.1 m. His power of accomodation is 4 Diopters.(i) What power lenses are required to see distant objects ? (ii) What is his near point without glasses ? (iii) What is his near point with glasses ? (iii) What is his near point with glasses ? (Take the image distance from the lens of the eye to the retina to be 2 cm.)

For normal eye vision what is the object distance and image-distance when the object is placed at a far point? (Take the distance between the eye lens and the retina as 2.3 cm.)

A thin convex lens of focal length 5 cm is used as a simple microscope by a person with normal near point (25"cm") . What is the magnifying power of the microscope.?

The length of a tangent from point A at distance 5cm from the center of the circle is 4cm. Find the radius of the circle.

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 distance between the eye lens and the retina is known as the .........