The far point of a myopic person is $80 \, cm$ in front of the eyes. What is the nature and power of the lens required to enable him to see very distant objects distinctly?

Light rays entering the eye are refracted by the lens and form an image on a specific part of the eye. What is this part called?

$(i)$ Calculate the maximum power of accommodation of a person having normal vision.
$(ii)$ $A$ person needs to use glasses for reading a newspaper. Identify the defect in her vision and the type of lens she would need to correct it.
$(iii)$ Sometimes when we enter a dark room from bright sunlight,we are unable to see objects clearly. Why?

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

Where is the image formed in an eye suffering from near-sightedness?

When one enters a dim-lit room from bright light,one is unable to see the objects in the room for some time. Explain why.