• Publications
  • Influence
The Visual Ecology of Avian Photoreceptors
  • N. Hart
  • Biology, Medicine
  • Progress in Retinal and Eye Research
  • 1 September 2001
The spectral sensitivities of avian retinal photoreceptors are examined with respect to microspectrophotometric measurements of single cells, spectrophotometric measurements of extracted or in vitroExpand
  • 483
  • 69
Visual pigments, oil droplets, ocular media and cone photoreceptor distribution in two species of passerine bird: the blue tit (Parus caeruleus L.) and the blackbird (Turdus merula L.)
Abstract The spectral absorption characteristics of the retinal photoreceptors of the blue tit (Parus caeruleus) and blackbird (Turdus merula) were investigated using microspectrophotometry. TheExpand
  • 416
  • 58
Variations in cone photoreceptor abundance and the visual ecology of birds
  • N. Hart
  • Biology, Medicine
  • Journal of Comparative Physiology A
  • 2001
Abstract. The relative abundance and topographical distribution of retinal cone photoreceptors was measured in 19 bird species to identify possible correlations between photoreceptor complement andExpand
  • 218
  • 45
Vision in the peafowl (Aves: Pavo cristatus).
  • N. Hart
  • Biology, Medicine
  • The Journal of experimental biology
  • 15 December 2002
The visual sense of the Indian blue-shouldered peafowl Pavo cristatus was investigated with respect to the spectral absorption characteristics of the retinal photoreceptors, the spectralExpand
  • 216
  • 34
Ultraviolet Vision in Birds
Publisher Summary Birds can see ultraviolet (UV) light because, unlike humans, their lenses and other ocular media transmit UV, and they possess a class of photoreceptor, which is maximally sensitiveExpand
  • 404
  • 25
Avian Visual Pigments: Characteristics, Spectral Tuning, and Evolution
  • N. Hart, D. Hunt
  • Medicine, Biology
  • The American Naturalist
  • 1 January 2007
Birds are highly visual animals with complex visual systems. In this article, we discuss the spectral characteristics and genetic mechanisms of the spectral tuning of avian visual pigments. The avianExpand
  • 260
  • 24
  • PDF
Modelling oil droplet absorption spectra and spectral sensitivities of bird cone photoreceptors
Birds have four spectrally distinct types of single cones that they use for colour vision. It is often desirable to be able to model the spectral sensitivities of the different cone types, which varyExpand
  • 191
  • 24
An Integrative Framework for the Appraisal of Coloration in Nature
The world in color presents a dazzling dimension of phenotypic variation. Biological interest in this variation has burgeoned, due to both increased means for quantifying spectral information andExpand
  • 161
  • 8
  • PDF
Red/near-infrared irradiation therapy for treatment of central nervous system injuries and disorders
Abstract Irradiation in the red/near-infrared spectrum (R/NIR, 630–1000 nm) has been used to treat a wide range of clinical conditions, including disorders of the central nervous system (CNS), withExpand
  • 52
  • 8
  • PDF
Cone photoreceptor oil droplet pigmentation is affected by ambient light intensity
SUMMARY The cone photoreceptors of many vertebrates contain spherical organelles called oil droplets. In birds, turtles, lizards and some lungfish the oil droplets are heavily pigmented and functionExpand
  • 63
  • 8
  • PDF