Firstly, you need to locate the small screws on the eyepiece. Then use a small screwdriver, tighten the screws. In most cases, turn the screw right to tighten and left to loosen. Try the sunglasses on. If they still feel loose, repeat the second step until the glasses is suitable for you.
What's more, do not over tighten the screws, leave it a comfort zone.
Well, of course, it will be annoying to have loose sunglasses. And also, you will feel uncomfortable when your channel sunglasses are too loose, and they can often slide off from your eyes. So just take some measures to tighten them. At first, you can put on your eyeglasses, and then look in the mirror, for in that way, you just can identify precisely where the frame problems occur. Second, you should tighten the screws on your eyeglasses. Of course, when you do them, just be careful about it. In some cases, a pair of needle-nose pliers can be essential. Finally, a small, corrective bend in one arm at a time should be done. Anyway, you can just have a try.
Sunglasses tend to become loose due to everyday use and taking the glasses off improperly and it is easy to tight them by your self. Here are the instructions, just four steps.
First, you need to locate the small screws on each side of the eyepiece of the sunglasses.
Second, you need to use small screwdriver and tighten the screws. Turn the screws right to tighten and turn left to loosen.
Third, you can put the sunglasses on. Feel they are tight enough or not, if not, repeat the work above.
Fourth, you need to avoid over tightening the screws as this will strip them and they will come back to be tight any more.
Try it and good luck!
Loose glasses fall down on your face and can fall off and break if you make too swift of a movement. Actually, you can tighten your loose eyeglasses easily at home. Procure an eyeglasses repair kit and tighten the screws that hold the legs to the front of the glasses. Try on your glasses and see if the frames have been sufficiently tightened. If the glasses quickly slip back to being loose again, you will need to replace the screws. Remove the screws from each side and replace them with screws from the eyeglass repair kit. Tighten the new screws and try your glasses on. Hope this helpful.