UFC star Rose Namajunas just shared the most disturbing clip of the week on this lovely Monday afternoon ... showing her getting a silicone tube removed from her eye.

We saw it ... so now you do, too.

Thug -- who underwent surgery after her loss to Natalia Silva at UFC 324 in January -- says she's back to 100% after a recent trip to the doctor ... where he pulled the medical device right from her socket.

"Oh God, that is not what I thought it was gonna be," Namajunas said after the procedure.

Thug said she underwent canalicular tube surgery after getting hit in the eye "a few times" in her bout against Silva ... stating her tube was torn and needed fixing.

Fast forward to a few hours ago ... and she says she's hopeful eye-pokes are taken more seriously in the future after what she went through.

"I propose instant purse deduction even for an accident," Namajunas said. "An accident that could seriously affect a fighters health long term. Anyways I’m just grateful that it was not more serious 🙏 #itsnotthegloves."