Assertion: eyepiece's lens | /r/HasProperty | plano-convex
Facets:
value: plano
type: OTHER
value: with facing" the specimen
type: OTHER
value: in their simplest form
type: OTHER
Source sentences:
text: In their simplest form, both lenses are plano-convex, with convex sides "facing" the specimen.
text: Huygens eyepieces consist of two plano-convex lenses with the plane sides towards the eye separated by an air gap.