Many animals have a tissue layer called the tapetum lucidum in the back of the eye that reflects light back through the retina , increasing the amount of light available for it to capture .
Many animals reducing the sharpness of the focus of the image .
Many animals have a tissue layer called the tapetum lucidum in the back of the eye that reflects light back through the retina , increasing the amount of light available for it to capture , but reducing the sharpness of the focus of the image .