If you have bought glasses online, you must have such an experience: You recently wanted to change a pair of good-looking but affordable glasses, and saw some glasses that you like very much on the advertisement from social media platforms, like YouTube or Facebook, and the prices on the website look very attractive. But when you start to choose lenses , you find that things goes different: no matter how you choose, you need to pay extra for the lenses, and it`s not cheap. The dazzling options make you hesitate and entangled, because you don`t fully understand their differences or why they are so expensive. The final order amount can also be imagined-far beyond the advertised price, and also beyond your initial budget.