A person with a myopic eye cannot see objects beyond `1.2 m` distinctly. What should be the type of corrective lens to restore proper vision ?

(a) Draw a diagram to show the formation of image of a distant object by a myopic eye. How can such an eye defect be remedied ? (b) State two reasons due to which this eye defect may be caused. ( c) A person with myopic eye cannot see objects beyond a distance of 1.5 m . What would be the power of the corrective lens used to restore proper vision ?

(a) What is short-sightedness ? State the two causes of short-sightedness (or myopia). With the help of ray diagram, show : (i) the eye-defect short-sightedness. (ii) correction of short-sightedness by using a lens. (b) A person having short-sight cannot see objects clearly beyond a distance of 1.5 m. What would be the nature and power of the corrective lens to restore proper vision ?

A short-sighted person cannot see objects situated beyond 2m from him distinctly. What should be the power of the lens which he should use for seeing distant objects clearly?

A short-sighted person cannot see objects situated beyond 2m from him distinctly. What should be the power of the lens which he should use for seeing distant objects clearly ?

A long-sighted person can see objects beyond 1 m distinctly. Calcualte the power of the lens that should be prescribed for him normal vision.

(a) A student suffering from myopia is not able to see distinctly the objects placed beyond 5 m . Two possible reasons due to which this defect of vision may have arisen. With the help of ray diagrams, explain : (i) Why the student is unable to see distinctly the objects placed beyond 5 m from his eyes. (ii) The type of corrective lens used to restore proper vision and how this defect is corrected by the use of this lens. (b) If in this case, numerical value of focal length of corrective lens is 5 m , find the power of the lens as per the new cartesion sign convention.