it has been estimated that dogs

Most breeds have good vision, but some show a genetic predisposition for myopia – such as Rottweilers, with which one out of every two has been found to be myopic.[113] Dogs also have a greater divergence of the eye axis than humans, enabling them to rotate their pupils farther in any direction. The divergence of the eye axis of dogs ranges from 12–25° depending on the breed.[119]
Experimentation has proven that dogs can distinguish between complex visual images such as that of a cube or a prism. Dogs also show attraction to static visual images such as the silhouette of a dog on a screen, their own reflections, or videos of dogs; however, their interest declines sharply once they are unable to make social contact with the image.[123]
Hearing
The physiology of a dog ear.
Transformation of the ears of a huskamute puppy in 6 days
The frequency range of dog hearing is approximately 40 Hz to 60,000 Hz,[124] which means that dogs can detect sounds far beyond the upper limit of the human auditory spectrum.[115][124][125] In addition, dogs have ear mobility, which allows them to rapidly pinpoint the exact location of a sound.[126] Eighteen or more muscles can tilt, rotate, raise, or lower a dog's ear. A dog can identify a sound's location much faster than a human can, as well as hear sounds at four times the distance.[126]
Smell
The wet, textured nose of a dog
While the human brain is dominated by a large visual cortex, the dog brain is dominated by an olfactory cortex.[113] The olfactory bulb in dogs is roughly forty times bigger than the olfactory bulb in humans, relative to total brain size, with 125 to 220 million smell-sensitive receptors.[113] The bloodhound exceeds this standard with nearly 300 million receptors.[113]
Consequently, it has been estimated that dogs, in general, have an olfactory sense ranging from one hundred thousand to one million times more sensitive than a human's. In some dog breeds, such as bloodhounds, the olfactory sense may be up to 100 million times greater than a human's.[127] The wet nose, or rhinarium, is essential for determining the direction of the air current containing the smell. Cold receptors in the skin are sensitive to the cooling of the skin by evaporation of the moisture by air currents