Differentiate between:
Rods and cones
Rods |
Cones |
1. They are sensitive to dim light and their integration is long. Hence, slow response. |
1. They are sensitive to bright light and their integration time is fast. Hence, fast response. |
2. Rods contain the pigment rhodopsin. Deficiency of it causes night blindness |
2. Cones contain the pigment iodopsin. Deficiency of it causes blindness. |
3. They have no role to play in imparting colour vision and are not differentiated. |
3. They are responsible for colour vision and are differentiated into- red, blue and green. |
4. They are found in the periphery of the retina. |
4. They are found in the centre of the retina. |