1. Furthermore, the rod-to-cone cell ratio can be variable even among diurnal species. 2. Cones are responsible for responses from, these three types of cone cells . 3. The fovea, directly behind the lens, consists of mostly densely packed cone cells . 4. It is a small pit that contains the largest concentration of cone cells . 5. Cone cells detect color and definition, and function in bright light.6. But if your cone cells don't work-I don't understand why yellow would seem brighter. 7. Though cone cells primarily use the neurotransmitter substance acetylcholine, rod cells use a variety. 8. S cone cells can see short wavelength colours, which corresponds to violet and blue. 9. Cone cells , conversely, need high light intensities to respond and have high visual acuity.10. :: The cone cells detect color but the rod cells only detect overall brightness.