The development of a puppy's eyes/sight

This is an old blog post that I repeat because it is factual and interesting:

Even though the puppies' eyes are opened since more than a week they do not see very clearly. That is obvious to me, cause they are totally lost and can not find Yatzie when she moves to a different place in the puppy ren. They wander around and fall down and only rely on their smell to find her. I also notice that they are very sensitive to fast movements and that it scares them. It is important to only make slow movements when youa are with the puppies to make them feel safe.

I found this interesting description about eye development in puppies on Internet for those of you who want to know more:

Puppies Are Born Blind
Dogs, like the wolves they descended from, are predators. And like wolves, dogs give birth to offspring with eyes and ears that are sealed. Sealed eyes and ears are an evolutionary trait—short pregnancies allow the puppies’ mothers to get back out and hunt more quickly. During puppies’ first two weeks of life, their nervous system completely forms, they become able to adapt to their environment’s temperature and their eyes and ears continue to develop.

First Improvement
The first improvement in puppies’ eyesight comes when their eyes open for the first time, usually between the ages of 10 and 14 days. When their eyes first open, puppies can see light and movement. However, they lack the ability to see details, since their corneas have not completely developed. Neither have their irises developed their (typically) brown pigment. All puppies have bluish eyes for this reason.

Second Improvement
As puppies grow and develop, their eyesight continues to develop as well. However, the most noticeable improvement next comes when they reach 4 or 5 weeks of age. During this transitional period, visual development is rapid. Puppies begin to explore and learn about their world at this age. They also learn about their siblings and their mothers or other dogs as they begin social play.

Developed Vision
By the time puppies reach about 7 weeks of age, their eyesight is fully developed. Barring illness, injury or congenital issues that develop over time, their eyesight has developed to what it should be in adulthood. Although their vision has improved significantly from newborn puppyhood, they still possess limited binocular vision due to the shape of their heads and have limited color perception compared to human beings. While dogs see motion, even quick movements, much better than human beings do, they may also lose sight of something when it is still.

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