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Question
Differentiate between rod and cone cells.
Distinguish Between
Solution
| Sr. No. | Rods | Cones |
| 1. | Rods help in seeing objects at night or in low light conditions. This phenomenon is also known as scotopic vision. | Cone cells help in seeing during daytime and detecting colours of the objects around us. This type of vision is called photopic view. |
| 2. | These photoreceptor cells have rod-like structures and around the periphery of the retina. | These cone-shaped cells are seen in the centre of the retina. |
| 3. | The total 125 million photoreceptor cells, there are a total of 120 million rod cells. | There are 5 million cone-shaped photoreceptors. |
| 4. | Rod cells are susceptible to light particles, which is why they can detect objects in low light conditions. | Compared to rod cells, they are not sensitive to photon particles. For instance, a response by cone cells to 100 photons is equal to the response of rod cells to one. |
| 5. | Deficiency of pigment in rod cells causes night blindness. | Colour blindness is caused if there is a deficiency of cone cell pigment. |
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Sensory Reception and Processing
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