Comparison between Rods and Cones

By: Prof. Dr. Fazal Rehman Shamil | Last updated: February 3, 2024

 

 

AspectRodsCones
Presence in the RetinaMore numerous (about 20 times more than cones)Less numerous
Location in the RetinaPredominantly in the peripheral regions of the retinaConcentrated in the central region of the retina (fovea)
Sensitivity to LightHighly sensitive to low light levelsLess sensitive to low light, more active in bright light
Nature of visionScotopic visionPhotopic vision
Function Predominantly involved in peripheral and night visionPredominantly responsible for central and color vision
Visual AcuityLower visual acuity (less ability to discern fine details)Higher visual acuity (better ability to discern fine details)
Color SensitivityMostly achromatic (sensitive to shades of light and dark)Responsible for color vision (trichromatic vision)
Pigment TypeRhodopsinPhotopsin  which is a visual pigments specific to different cones
Adaptation to Bright LightSlow adaptationRapid adaptation
Recovery Time after Light ExposureHave a  longer recovery time after exposure to bright lightShorter recovery time after exposure to bright light
Role in Dim Light ConditionsMain photoreceptors in low-light conditionsLimited function in low-light conditions
Role in Daylight ConditionsLess active in well-lit conditionsMain photoreceptors in well-lit conditions