Find the power of the eye lens of the normal eye when it is focussed at its
near point. Assume the distance of the retina from the eye lens to be 2.5 cm.

Find the power of the eye lens of the normal eye when it is focussed at its far point.

Find the power of a convex lens of focal length 25 cm.

Find the distance of the point (-3,4) from the line 12x-5y+2=0

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

Find the distance of the point (2,3, - 5) from the plane x + 2y - 2z = 9.

Find the distance of the point (6, 2, -5) from the plane 2x + 3y - 2z = 8.

Make a diagram to show how hypermetropia. is corrected. The near point of a hypermetropic eye is 1 m. What is the power of the lens required to correct this defect? Assume that the near point of the normal eye is 25 cm.

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

A compound microscope has a magnification of 30. The focal length of its eye piece is 5 cm. Assuming the final image to be formed at near point, calculate the magnification produced by the objective.