• Publications
  • Influence
Absorption of white light in photoreceptors
The fraction F of incident light absorbed by a photoreceptor of length l has traditionally been given by F = 1 - e-kl, where k is the absorption coefficient of the photoreceptor. Unfortunately, thisExpand
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Seeing better at night: life style, eye design and the optimum strategy of spatial and temporal summation
  • E. Warrant
  • Medicine, Psychology
  • Vision Research
  • 1 May 1999
Animals which need to see well at night generally have eyes with wide pupils. This optical strategy to improve photon capture may be improved neurally by summing the outputs of neighbouring visualExpand
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Vision in the deep sea
The deep sea is the largest habitat on earth. Its three great faunal environments – the twilight mesopelagic zone, the dark bathypelagic zone and the vast flat expanses of the benthic habitat – areExpand
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Crepuscular and nocturnal illumination and its effects on color perception by the nocturnal hawkmoth Deilephila elpenor
SUMMARY Recent studies have shown that certain nocturnal insect and vertebrate species have true color vision under nocturnal illumination. Thus, their vision is potentially affected by changes inExpand
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An Anatomically Constrained Model for Path Integration in the Bee Brain
Path integration is a widespread navigational strategy in which directional changes and distance covered are continuously integrated on an outward journey, enabling a straight-line return to home.Expand
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Vision in the dimmest habitats on Earth
  • E. Warrant
  • Geography, Medicine
  • Journal of Comparative Physiology A
  • 16 September 2004
A very large proportion of the world’s animal species are active in dim light, either under the cover of night or in the depths of the sea. The worlds they see can be dim and extended, with lightExpand
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Scotopic colour vision in nocturnal hawkmoths
Humans are colour-blind at night, and it has been assumed that this is true of all animals. But colour vision is as useful for discriminating objects at night as it is during the day. Here we show,Expand
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Nocturnal Vision and Landmark Orientation in a Tropical Halictid Bee
BACKGROUND Some bees and wasps have evolved nocturnal behavior, presumably to exploit night-flowering plants or avoid predators. Like their day-active relatives, they have apposition compound eyes, aExpand
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Warm Eyes Provide Superior Vision in Swordfishes
Large and powerful ocean predators such as swordfishes, some tunas, and several shark species are unique among fishes in that they are capable of maintaining elevated body temperatures (endothermy)Expand
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Arthropod eye design and the physical limits to spatial resolving power
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