1、Take off and wear with both hands, hold and put them gently, place them with lenses upwards, when not in use, it is better to put them into a hard case for storage, if you are not comfortable with the looseness of the frame or if there is any screw looseness, you should go to an optician to adjust the frame and tighten the screws in a timely manner.   2、Coated lenses have high clarity, so they can not be touched with organic chemicals, oil, sweat and acid, or hard objects, otherwise, it is easy to damage the film layer, affecting the clarity and aesthetics.   3、When glasses are not in use, especially resin lenses or PC lenses and plastic frames should not be placed in high temperature places such as next to the heaters and stoves, as the high temperature will deform and damage the lenses or frames.   4、When engaging in strenuous exercise, both glass and resin lenses may be broken, so please be extra careful.   5、After using the glasses every day, please wipe off the grease and sweat acid on the nosepiece and frame in time, so as to prolong the service life of the glasses.

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