Answer:
The best answer to the question: What is the most likely diagnosis, would be: Ethmoid bone fracture.
Step-by-step explanation:
The reason for this being the diagnosis comes from two things: first knowing that the ethmoid bone is a skeletal structure that forms the root of the nose, it forms and separates the nasal cavity, and it also forms part of both eye sockets. Because of its composition, it can be liable to fracture, especially under certain traumatic circumstances. In this case, this man received one such trauma by being hit with a hard object, namely, a baseball. The second reason is the pain and the symptoms on the left eye and left side of the face and nasal area. This, paired with the findings of the physical assessment, as well as the results from the tests, all points towards the fracture of the ethmoid bone.