The ability of eye – lens to change its focal length is called………

The part of the eye sensitive to light is …………

The cells present in the retina of an eye which identify the colour of an object are …………

The cells present in the retina of an eye which are sensitive to intensity of light are………

The light signals are transmitted to the brain through …………

The function of the rods of the retina is to ……………

The maximum and minimum focal lengths of the eye lens respectively are ……………

Which part of human eye is called “Variable aperture”?

For any position of an object in front of the human eye the image distance is fixed at …………

Which of the following changes takes place when you walk out of bright sunshine into a poorly light room ?

When objects at different distances are seen by the eye one of the following remains constant.

Which part of the human eye contains “rods” and “cones” to receive the light signals?

For any position of the object in front of the human eye the image distance is ………

Which of the following is common defect of vision ?

Some people can not see objects at long distances but can see nearby objects clearly. This type of defect in vision is called ………