Final answer:
The ocular lens or eyepiece is the part of the microscope that forms an enlarged, virtual image from the real image formed by the objective lens.
Step-by-step explanation:
The part of a microscope that uses the real image formed by the objective lens and forms from it an enlarged, virtual image is the ocular lens or the eyepiece.
The objective lens forms the first image, which is larger than the object, and the eyepiece further magnifies this first image to create a final enlarged and virtual image.
The ocular lens is positioned so that the first image is within its focal length, allowing it to magnify the image.