Caution for rimless eyeglasses, half rim glasses, and full rim glasses.

Rimless eyeglasses: do not open it hard, and take care not let fall down to ground. Often using screwdriver to fasten the screws.

Half rim glasses: try your best not let it fall down. When wear the eyeglasses, try using both of your hands.

Full rim glasses: also should take care not let it down to ground.