tapetum lucidum
Quick Summary
The tapetum lucidum is a reflective layer found behind the retina in the eyes of many nocturnal vertebrates. Its primary function is to enhance vision in low-light conditions. This layer, often composed of the white compound guanine, acts like a mirror, reflecting light that has already passed through the retina back onto the photoreceptors. This gives the photoreceptors a second opportunity to absorb the available photons, significantly improving the animal's ability to see in dim light. This phenomenon is responsible for the characteristic "eyeshine" observed in many nocturnal animals when light, such as from a flashlight or headlights, reflects off their eyes.12
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felineForm and function…layer of guanine called the tapetum lucidum, which reflects light and causes the eyes to shine at night when illuminated. Cats have good senses of sight and hearing, but their sense of smell is not as developed as that of the canids, a fact suggested by the cat’s short snout.
Read More…layer of guanine called the tapetum lucidum, which reflects light and causes the eyes to shine at night when illuminated. Cats have good senses of sight and hearing, but their sense of smell is not as developed as that of the canids, a fact suggested by the cat’s short snout.
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crocodileForm and function…wall of the eye, the tapetum lucidum reflects incoming light, thus utilizing the small amount of light available at night to best advantage. In addition to the protection provided by the upper and lower eyelids, the nictitating membrane (that is, a thin, translucent eyelid) may be drawn over the eye…
Read More…wall of the eye, the tapetum lucidum reflects incoming light, thus utilizing the small amount of light available at night to best advantage. In addition to the protection provided by the upper and lower eyelids, the nictitating membrane (that is, a thin, translucent eyelid) may be drawn over the eye…
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lemurGeneral features…by a reflective layer (tapetum) behind the retina in the eye, but no fovea or macula lutea; a hairless, moist tip to the muzzle; a noninvasive (epitheliochorial) placenta; comblike forward-directed lower front teeth (with the exception of the aye-aye); and a claw (“toilet claw”) on the second toe of…
Read More…by a reflective layer (tapetum) behind the retina in the eye, but no fovea or macula lutea; a hairless, moist tip to the muzzle; a noninvasive (epitheliochorial) placenta; comblike forward-directed lower front teeth (with the exception of the aye-aye); and a claw (“toilet claw”) on the second toe of…
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