Rods

Cones

1. They are more in number about 125 million in human eyes.

2. Outer segment is cylindrical.

3. Has protein rhodospsin.

4. They are sensitive to dim light.

5. Do not perceive colour.

6. They are of one type.

1. They are comparatively very less in number about 6 million in a human eye.

2. Outer segment is conical.

3. Has protein iodopsin.

4. It is sensitive to bright light.

5. Perceive colour.

6. They are of three types.