| Rods | Cones |
|---|---|
| 120 million in each eye | 6 million in each eye |
| Located mainly in periphery of retina | Located mainly in fovea and central retina |
| Primarily responsible for dim light vision | Primarily responsible for bright light vision |
| Responsible for achromatic (colorless) vision | Responsible for chromatic (color) vision |
| Lead to low visual acuity | Lead to high visual acuity |