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Updated: Jun 8, 2026
08:33
Determination of Photoreceptor Cell Spectral Sensitivity in an Insect Model from In Vivo Intracellular Recordings
Published on: February 26, 2016
Limits of colour vision in dim light
1Department of Biology, Lund University, Helgonavägen 3, Lund, Sweden. almut.kelber@cob.lu.se
Summary
Most animals use one photoreceptor type for dim light vision. However, some nocturnal species achieve color vision in low light by sacrificing resolution, a feat explored in this study.
Area of Science:
- Vision Science
- Comparative Physiology
- Animal Behavior
Background:
- Vertebrates typically possess duplex retinae: multiple cone types for bright-light color vision and a single rod type for dim-light achromatic vision.
- This adaptation optimizes signal-to-noise ratio in low light by using a single, highly sensitive receptor type.
Purpose of the Study:
- To investigate the mechanisms of color vision in dim light across diverse animal species.
- To compare the color vision thresholds with the optical sensitivity of photoreceptors in animals with lens and compound eyes.
Main Methods:
- Review of existing literature on dim-light color vision.
- Comparison of reported color vision thresholds with photoreceptor optical sensitivity data.
- Analysis of species with lens and compound eyes, including nocturnal insects and reptiles.
Main Results:
- Certain nocturnal species, such as the hawkmoth (Deilephila elpenor), nocturnal bee (Xylocopa tranquebarica), and gecko (Tarentola chazaliae), exhibit color discrimination at extremely low light intensities.
- These species achieve dim-light color vision at the expense of spatial and temporal resolution.
Conclusions:
- Dim-light color vision is achievable in some nocturnal animals through specialized adaptations.
- Understanding these adaptations provides insights into the evolution and diversity of visual systems.
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