eyepiece

[ahy-pees] /ˈaɪˌpis/

noun

the lens or combination of lenses in an optical instrument through which the eye views the image formed by the objective lens or lenses; ocular.

Origin

1780-90; eye + piece

Examples from the web for eyepiece

To confirm eyepiece diameter, remove an eyepiece, and inspect the diaphragm size inside the eyepiece.
If the field is not in focus, twist the eyepiece until the graduations are clearly distinguishable.
There are dark shadows in the field which move as you turn around the eyepiece.

British Dictionary definitions for eyepiece

/ˈaɪˌpiːs/

noun

the lens or combination of lenses in an optical instrument nearest the eye of the observer

eyepiece in Medicine

eyepiece eye·piece (ī'pēs')
n.
The compound lens located at the end of a microscope tube nearest the eye. Also called eyeglass.

eyepiece in Science

eyepiece

(ī'pēs')
The lens or group of lenses closest to the eye in an optical instrument such as a telescope or microscope.