Check three parts of your glasses to wear comfortably.
1.Temple Bend
2.Nose-Pad
3.Width between Temples
1.Temple Bend
Bend temple at top of the base of the ear(Figure1).
Please look Figure 1,you can see Temple Bend is at the base of the ear.
If you adjust your glasses like this,they will fit your face and not sliding down.
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Failure 1:Do not bend temple before the bese of the ear(Figure2).
If you bend temples like this,your glasses sliding down off your face.
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Failure 2:Do not bend temple beyond the bese of the ear(Figure3).
If you bend temple beyond the bese of the ear,your glasses have come loose. Please adjust proper position.
How to bend temples.
You required two steps to adjust temples.
2.Nose-Pad
In daily use,nose-pad of your glasses getting crushed.This makes a cause of slidding down of glasses.Set up nose-pad by your hands.If it difficult,you can use pliers.
3.Width between Temples
Width between temples gonna be 14cm(5.5inches).It's an average width of human face. Bend the root of temples please.If it hard,use pliers in your tresure box.