Written by the Fiveable Content Team • Last updated September 2025
Written by the Fiveable Content Team • Last updated September 2025
Definition
The eyepiece, or ocular lens, is the part of a microscope through which you view the magnified object. It typically contains one or more lenses that further magnify the image produced by the objective lens.
5 Must Know Facts For Your Next Test
The eyepiece usually has a magnification power between 5x and 30x.
It works in conjunction with the objective lens to provide total magnification, calculated by multiplying their magnifications.
The field of view decreases as magnification increases through the eyepiece.
Eyepieces can be monocular, binocular, or trinocular depending on the microscope design.
High-quality eyepieces reduce optical aberrations and improve image clarity.