To take off one's glasses; to remove spectacles from one's face.
家に帰るとすぐ眼鏡を外す。
I take off my glasses as soon as I get home.
授業中でも目が疲れたら一度眼鏡を外して休むといい。
Even during class, if your eyes get tired it's good to take off your glasses and rest for a moment.
暑くて眼鏡を外したら、視界が少しぼやけた。
I took off my glasses because it was hot, and my vision became a bit blurry.