Can I compress my glasses several times?

pu1. It's good that it's light because it's thin. It's not durable because it's thin

2017-11-10

OK

pu2. You don't have to do it on purpose. If you do it a lot, it's light

2017-11-10

OK

pu3. If the lens is thick, you can compress it several times, but as the lens becomes thinner, the weight becomes lighter
You don't have to do it because it's expensive

2017-11-10

OK