Paw Priority PetVision
See the world through your pet’s eyes
Human
DogHow pets see differently
A simulation based on what we know about dog and cat eyes.
Two color receptors, not three
Both dogs and cats are dichromats — they have cones for blue and yellow but not red. Reds, oranges and greens collapse into muted yellows and grays, similar to red-green color blindness in people. Cats see color even less vividly than dogs do.
Softer focus overall
Dog visual acuity is roughly 20/75 and a cat’s is lower still, around 20/100–20/150 — what they see sharply at 20 feet, a person sees at 75 or more. Both also focus poorly on very close objects, so fine detail stays soft at any distance.
Near-sighted or far-sighted?
On average, dogs are close to normal focus — neither — but it varies by breed. German Shepherds, Rottweilers and Miniature Schnauzers tend toward near-sightedness (myopia). The “Near-sighted breed” toggle adds the extra blur a myopic dog lives with.
The aging lens
With age, the lens grows denser and takes on a bluish-gray haze — nuclear sclerosis, a normal change and distinct from cataract. It scatters incoming light, so an older pet sees with more glare, lower contrast and softer focus, and needs more light than a young animal. The “Aged lens” setting approximates that hazy, washed-out view.
Cataract is different — and far more serious
A cataract is a true clouding of the lens, not the harmless haze of nuclear sclerosis. It scatters and blocks light heavily, dropping vision to gross shapes, movement and the direction of light — like looking through frosted glass. The “Cataract” setting shows that. Telling these two apart is one of the most common eye questions owners bring to the vet.
Built for the dark
Dogs and cats have a reflective layer behind the retina (the tapetum lucidum — what makes their eyes glow) plus many more rod cells than we do. Dogs need roughly a fifth of the light we do to see; cats need about a sixth. Humans have neither advantage.
Why night views differ by species
In the dark, human vision turns nearly grayscale, grainy and low-contrast, and dim objects vanish when looked at directly. Dogs see a brighter, usable scene. Cats — built for dawn and dusk hunting — see the brightest and clearest of the three.
Wider view, sharper motion
With eyes set toward the sides, dogs and cats have a wider field of view than we do and detect motion far better than fine detail — great for tracking a thrown ball or a darting mouse, less so for reading.
This is an educational approximation, not a measurement. Color, blur, brightness and grain are stylized to communicate the key differences and will vary by breed, individual, age and lighting. The night modes are relative transforms — point the camera at a dim scene to see them best.