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How are cats adapted to see in low light?
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carnivore
Adult snow leopards (Panthera uncia or Uncia uncia) can grow to a length of about 2.1 meters (7 feet) from head to tail and weigh 23–41 kg (50–90 pounds).
Cats are highly adapted for low-light environments, which is essential for their nature as crepuscular hunters active at dawn and dusk. Their ability to see in dim conditions is supported by several key physiological features:12
- Tapetum Lucidum: Cats possess a reflective layer of cells behind the retina called the tapetum lucidum. This mechanism acts as a mirror, giving photoreceptors a second chance to capture photons that were missed on their first passage through the retina, allowing them to use ambient light with high efficiency.13
- Slit Pupils: The vertical slit shape of a cat's pupil allows for precise control over light entry. In low-light conditions, the pupils can open wide to maximize light intake, while in bright daylight, they constrict to protect the sensitive retina.2
- Photoreceptor Density: Like other nocturnal and crepuscular animals, cats rely on retinas that contain a high concentration of rods. These cells are significantly more sensitive to light than cones, enabling the perception of brightness and movement in environments with only one-sixth of the illumination required by humans.134