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Q. My dogâs eyes are red. A. Dr. Nunnery: Changes in the color of the eyes can be disconcerting. In fact, itâs one of the most common eye concerns that compel owners to bring dogs to the vet.. My dog has been squinting, as well as rubbing, his eyes. A. Squinting or holding the eye shut usually indicates ocular pain, which can be intense because there are so many sensory nerve endings on the corneaâs surface.
Human eyes contain several types of cones, but canines have more rods and have no fovea, which is what helps with the vivid image colors that humans see. This means that your dog has excellent night vision that is far superior to humans because their motion detectors are much keener than that of humans.