* Lighting: The way the light is hitting your dog's eyes can make them appear blue, especially if the light is coming from behind them.
* Editing: Someone might have edited the photo to change the eye color. This is a common practice in digital photography.
* Breed: Some dog breeds are known for having blue eyes, like Siberian Huskies, Australian Shepherds, and some types of terriers. If your dog is one of these breeds, the photo might be accurate.
* Eye condition: Certain eye conditions, such as heterochromia (two different colored eyes) or certain genetic mutations, can also cause blue eyes in dogs.
To determine the true reason, you'll need to look at the photo itself and consider the factors mentioned above.
To help me understand better, could you tell me more about the photo?
* What breed is your dog?
* Was the photo edited in any way?
* What kind of lighting was there when the photo was taken?