Which species has a complete bony orbit protecting it from proptosis?

Horses have a complete bony orbit, which provides them with significant protection against proptosis, the displacement of the eyeball from the socket. This anatomical feature is important for the horse due to their size and lifestyle, as it helps to secure the eye in place and prevents injuries that may arise from environmental factors or aggressive encounters. The completeness of the bony orbit ensures that the eye is well-protected from trauma and other risks that could lead to proptosis.

In contrast, dogs and cats have more pronounced facial structures and partially open orbits, making them more susceptible to such conditions. Rabbits, while having some degree of orbital protection, do not possess a complete bony orbit like horses do, making them vulnerable to injuries that could lead to proptosis as well. This anatomical distinction is crucial in veterinary medicine, especially for species that are under risk of ocular trauma.