A person is able to objects clearly only when these are lying at a distance between 50 cm and and 300 cm from his eye.
Identify the kind of defects of vision he is suffering from. Give reason for your answer.

A certain person can see clearly objects at a distnaces btween 20 cm and 250 cm from his eye. What spectacles are required to enable him to see distant objects clearly?

A person wear spectacles of power-2.3 D Name the defect of vision he is suffering from.Draw the ray diagram for: The defective eye

A person can not see clearly objects beyond a distance of 1.2 m.Name the defect of vision he is suffering from.What would be the power of correcting lens used to restore proper vision?

A certain nearsighted person cannot see objects clearly,when they are more than 78 cm from either eye. The person's near pint is 23 cm.How is this affected,when viewing through the corrective lenses?Assume that the lenses in spectales are 3 cm in front of the eye.

If aperson uses spectacles of Power +1.0 dioptre, what is the nearest distance of distinct vision for him ? Given that near point of the person is 75 cm from the eye.

A card sheet divided into squares each of size 1 mm^2 is being viewed at a distance of 9 cm through a magnifying glass (a converging lens of focal length 10 cm) held close to the eye. What should be the distance between the object in converging lens and the magnifying glass if the virtual image of each square in the figure is to have an area of 6.25 mm^2 . Would you be able to see the squares distinctly with your eyes very close to the magnifier ?

A concave mirror of focal length 25 cm forms the real image of a point object at a distance O lying on its principal axis at a distance of 50 cm from the mirror. The mirror is cut into two halves and are drawn a distance of 1 cm apart in the direction perpendicular to the optical axis .How will the two halves of the concave mirror produce the image of the point object O?