The structure of dogs' eyes is similar to that of humans, but there are some differences. Here are some features of dog eye structure:
Eyeballs: Dog eyeballs are roughly the same as human eyeballs, but the size and shape can vary depending on the breed.
Pupillary: The dog's pupils will automatically adjust their size according to different light conditions. In low light, a dog's pupils dilate to increase the amount of light entering the eye.
Retina: The dog's retina is mainly composed of visual cells. Unlike the human retina, it also includes rod cells and cone cells. Dogs' visual acuity can be six times that of humans.
Eye appendages: Dog eyes also include appendages such as tear glands, meibomian glands and eyelashes. The main function of the lacrimal glands is to secrete tears, while the meibomian glands secrete oil to protect eye tissues.
