Until that age, a puppy has blurred vision and, if you start training him pupil eye sight sight one, offer the dog the chance to see the ball or the rag by repeating the stimulating movement. You should not, under any circumstance, correct a puppy or an adult dog for seeing a moving object too late or not at all.
To understand how a dog sees, one should know that there are two types of photoreceptors in the retina: the rods and the cones. Rods register low levels of light in black and white and are responsible for night vision.
Through the dilation of the pupil, the eye allows for more light to reach the retina. The other photoreceptors, called cones, are needed to see in colors and in good light conditions. Dogs have good binocular vision and a reduced visual field.
Image focalization is more efficient in dog breeds with frontal eyes, compared to those with lateral eyes. In other words, the dogs in Europe can watch TV programs without any difficulty, while the dogs in the USA, where the standard consists in lines per frame, can only see moving dots and lines.
I flex my pupil sometimes to strengthen my eye sight. Îmi contractez pupilele câteodată să-mi îmbunătățesc vederea. Put it right in front of his eye sight. Pune-o exact în fața ochilor săi.