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Encyclopedia > Tapetum lucidum
Tapetum lucidum in a calf eye, with the retina hanging down.
Tapetum lucidum in a calf eye, with the retina hanging down.
The tapetum lucidum reflecting green in the pupils of a cat.
The tapetum lucidum reflecting green in the pupils of a cat.

The tapetum lucidum (Latin: "bright carpet") is a reflecting layer immediately behind, and sometimes within, the retina of the eye of many vertebrates that serves to reflect light back to the retina, increasing the quantity of light caught by the retina. This improves vision in low light conditions, but can cause the perceived image to be blurry from the interference of the reflected light. It is therefore primarily found in nocturnal animals with good night vision, such as cats. bottlenose dolphins, dogs, and deer. Image File history File links Download high resolution version (837x824, 465 KB) Calf eyeball from a dissection done at University of Pennsylvania on 2005 Oct 13. ... Image File history File links Download high resolution version (837x824, 465 KB) Calf eyeball from a dissection done at University of Pennsylvania on 2005 Oct 13. ... Image File history File linksMetadata Download high resolution version (1600x1200, 944 KB) Summary A photograph showing that the red-eye effect isnt red in cats. ... Image File history File linksMetadata Download high resolution version (1600x1200, 944 KB) Summary A photograph showing that the red-eye effect isnt red in cats. ... Latin is an ancient Indo-European language originally spoken in Latium, the region immediately surrounding Rome. ... The reflection of a bridge in Indianapolis, Indianas Central Canal. ... Human eye cross-sectional view. ... A human eye Eyes are organs of vision that detect light. ... This article does not cite any references or sources. ... This article does not cite any references or sources. ... A bat illustrating nocturnal features. ... Binomial name Felis catus Linnaeus, 1758 Synonyms Felis lybica invalid junior synonym The cat (or domestic cat, house cat) is a small carnivorous mammal. ... Binomial name Montagu, 1821 Bottlenose Dolphin range (in blue) The Bottlenose Dolphin is the most common and well-known dolphin, recent molecular studies showing it is in fact two species, Common Bottlenose Dolphin (Tursiops truncatus), and Indo-Pacific Bottlenose Dolphin (). It inhabits warm and temperate seas worldwide and may be... Trinomial name Canis lupus familiaris The dog (Canis lupus familiaris) is a domestic subspecies of the wolf, a mammal of the Canidae family of the order Carnivora. ... Fawn and Stag redirect here. ...


The reflective effect of the tapetum lucidum is often called eyeshine.


The tapetum lucidum is not present in the human eye, which is why humans have poor night vision. The red-eye effect in humans is due to the light from the camera flash reflecting off of the back of the eye in an instant (the retina, not a tapetum lucidum layer). In flash photographs, the eyes frequently appear to be glowing in one of a wide variety of colors including blue, green, yellow and pink. The red-eye effect on a human. ... Running water frozen by flash. ... This article or section does not adequately cite its references or sources. ... Color is an important part of the visual arts. ... YOU SUCK!!!!! ... Mossy, green fountain in Wattens, Austria. ... A yellow Tulip. ... The use of the word pink as a color first occurred in the 17th century to describe the light red flowers of pinks, flowering plants in the genus Dianthus. ...


The tapetum works roughly on the interference principles of thin-film optics, as seen in other reflective tissues such as butterfly wings (see Blue Morpho). However, different species have different types of structured tissue that lead to different mechanisms of reflective interference (Ollivier 2004). Known tapetum structures include: Interference of two circular waves - Wavelength (decreasing bottom to top) and Wave centers distance (increasing to the right). ... Thin-film optics is the branch of optics which deals with very thin structured layers of different materials. ... Superfamilies and families Superfamily Hedyloidea: Hedylidae Superfamily Hesperioidea: Hesperiidae Superfamily Papilionoidea: Papilionidae Pieridae Nymphalidae Lycaenidae Riodinidae A butterfly is an insect of the order Lepidoptera. ... Binomial name Morpho menelaus Linnaeus, 1758 The Blue Morpho (Morpho menelaus) is a beautifully iridescent tropical butterfly of the Central and South American regions. ...

Superorders Osteoglossomorpha Elopomorpha Clupeomorpha Ostariophysi Protacanthopterygii Sternopterygii Cyclosquamata Scopelomorpha Lampridiomorpha Polymyxiomorpha Paracanthopterygii Polymyxiomorpha Acanthopterygii Teleostei is one of three infraclasses in class Actinopterygii, the ray-finned fishes. ... Genera Mecistops Crocodylus Osteolaemus See full taxonomy. ... Orders Didelphimorphia Paucituberculata Microbiotheria Dasyuromorphia Peramelemorphia Notoryctemorphia Diprotodontia Sparassodonta (extinct) Marsupials are mammals in which the female typically has a pouch (called the marsupium, from which the name Marsupial derives) in which it rears its young through early infancy. ... It has been suggested that this article or section be merged with megabats. ... The choroid, also known as the choroidea or choroid coat, is the vascular layer of the eye lying between the retina and the sclera. ... Superorders Batoidea (rays and skates) Selachimorpha (sharks) Elasmobranchii is the subclass of cartilaginous fish that includes skates, rays (batoidea) and sharks (selachii). ... This tigers sharp teeth and strong jaws are the classical physical traits expected from carnivorous mammalian predators A carnivore (IPA: ), meaning meat eater (Latin carne meaning flesh and vorare meaning to devour), is an animal that eats a diet consisting mainly of meat, whether it comes from live animals... Suborders Sciuromorpha Castorimorpha Myomorpha Anomaluromorpha Hystricomorpha Rodentia is an order of mammals also known as rodents. ... Suborders Mysticeti Odontoceti Archaeoceti (extinct) (see text for families) The order Cetacea (IPA: , L. cetus, whale) includes whales, dolphins and porpoises. ... COW is an acronym for a number of things: Can of worms The COW programming language, an esoteric programming language. ... Species See text. ... Species See Species and subspecies The goat is a mammal in the genus Capra, which consists of nine species: the Ibex, the West Caucasian Tur, the East Caucasian Tur, the Markhor, and the Wild Goat. ... Binomial name Equus caballus Linnaeus, 1758 The horse (Equus caballus, sometimes seen as a subspecies of the Wild Horse, Equus ferus caballus) is a large odd-toed ungulate mammal, one of ten modern species of the genus Equus. ...

References

  • Ollivier, F.J. et al. "Comparative morphology of the tapetum lucidum (among selected species)", Veterinary Ophthalmology 2004 Jan–Feb;7(1):11–22. PMID: 14738502.

http://www.springerlink.com/content/k1t44v5003v6hhm3/


  Results from FactBites:
 
Tapetum lucidum at AllExperts (310 words)
The tapetum lucidum reflecting green in the pupils of a cat.
The tapetum lucidum (Latin: "bright carpet") is a reflecting layer immediately behind, and sometimes within, the retina of the eye of many vertebrates (though not humans); it serves to reflect light back to the retina, increasing the quantity of light caught by the retina.
Choroidal tapetum fibrosum in cows, sheep, goats and horses.
Keiko and Katie’s Tapetum Page (534 words)
The tapetum is a special, highly reflective membrane layer in the back of an animals' eye, located behind the retina.
Since the tapetum is a highly reflective surface, the light that reaches it reflects right back at the retina, doubling the amount of light perceived by the retina.
However, the tapetum is not only used to improve animals' vision at night or in low light areas, but it also can shift wavelength for the sensitivity of the rod photoreceptors, thus enhancing the contrast.
  More results at FactBites »

 
 

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