Lacking a rim, as in rimless eyeglasses.(adjective)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "rimless" in a sentence
"Also, are the edges of the lenses exposed, such as rimless frames (or half frames), a stronger / thicker prescription, or "polished" edges on the lenses?"
"Mrs. Alsgood glanced at her distorted reflection in the microwave door, adjusted her rimless glasses, and pushed back a stray lock of gray hair."
"In his words, "the dark-suited preacher in rimless glasses spouting facts, fire and brimstone.""