Assertion: eyepiece's lens | /r/AtLocation | a variety of optical devices
Facets:
Source sentences:
text: An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes.
text: An eyepiece, or ocular lens, is a type of lens that is attached to a variety of optical devices such as telescopes and microscopes.