Miller P E, Murphy C J
Department of Surgical Sciences, School of Veterinary Medicine, University of Wisconsin, Madison 53706-1102, USA.
J Am Vet Med Assoc. 1995 Dec 15;207(12):1623-34.
Compared with the visual system in human beings, the canine visual system could be considered inferior in such aspects as degree of binocular overlap, color perception, accommodative range, and visual acuity. However, in other aspects of vision, such as ability to function in dim light, rapidity with which the retina can respond to another image (flicker fusion), field of view, ability to differentiate shades of gray, and perhaps, ability to detect motion, the canine visual system probably surpasses the human visual system. This has made the dog a more efficient predator in certain environmental situations and permits it to exploit an ecological niche inaccessible to humans.
与人类视觉系统相比，犬类视觉系统在双眼重叠程度、颜色感知、调节范围和视敏度等方面可能被认为较差。然而，在视觉的其他方面，如在暗光下的功能能力、视网膜对另一个图像的反应速度（闪烁融合）、视野、区分灰度的能力，以及或许检测运动的能力方面，犬类视觉系统可能超过人类视觉系统。这使得狗在某些环境情况下成为更高效的捕食者，并使其能够利用人类无法进入的生态位。
