What is the Difference Between a Sheep eye and Human eye?

The main differences between a sheep eye and a human eye include:

1. Shape of the retina: A crucial difference between the two is that the sheep's retina is shaped like a rectangle, offering a panoramic field of vision of 320-340 degrees. In contrast, the human eye has a circular retina, providing a narrower field of vision.
2. Location of the eye: Sheep eyes are placed sideways on their head, allowing for better peripheral vision. In contrast, human eyes are forward-facing, providing better depth perception.
3. Night vision: Sheep eyes have a layer of tissue called the tapetum lucidum behind the retina, which aids in night vision by reflecting light. This feature is lacking in the human eye.
4. Number of muscles for eye movement: Humans have six muscles for eye movement, while sheep have only four muscles to move their eyes.
5. Color vision: Sheep have limited color vision compared to humans.

Despite these differences, both sheep and human eyes share some similarities, such as having a lens, cornea, iris, and retina.

Comparative Table: a Sheep eye vs Human eye

Here is a table comparing the differences between a sheep eye and a human eye:

Sheep have a better peripheral vision than humans due to their sideways-positioned eyes, but they lack color vision and have inferior depth perception. Additionally, sheep have only four muscles for eye movement, while humans have six.