What is another word for the eyepiece on a microscope?

There isn't really another word for the eyepiece on a microscope that's commonly used. However, you could use these alternatives depending on the context:

* Ocular: This is a more scientific term for the eyepiece.

* Lens: This is a more general term, but it could be used if the context is clear.

* Viewing lens: This phrase emphasizes the function of the eyepiece.

Ultimately, the best word to use depends on the specific situation and your audience.