You make me feel confused. Why do you have to fake an eye test to get reading glasses? Also there is no way to fake it. There will be a machine shining a light in your eye and they will know what your prescription is.
It sounds crazy. I think you can buy a pair of Plano glasses if you just want to decorate yourself with glasses. Plano glasses will not do great damages to your eyes. Or you can just wear the frames only. Nowadays, many people will wear frames for fun.
My little brother just told me that he wanted to buy a pair of glasses. I asked him that whether he had some vision problems, he said no. I asked him why he wanted to buy a pair of glasses. He told me that there were so many people wearing glasses in his school so he wanted to wear it too. Of course I will not buy real glasses for him. But maybe I will buy him a pair of fake glasses (Plano glasses) or just a pair of frame. If you want a pair of such kind of glasses, you can told your mum or buy it by yourself in any store. But I don't think fake an eye test is a good way to get the glasses.
Fake an eye exam to get a pair of glasses that is not fit for you will do damage to your eyes. Many people who have vision problems are trying hard to find a way to help with their problems. Some even choose surgeries to cure those problems. The people who have good eyesight should appreciate that and take care of their eyes.
I think you can't do that. If you don't have any vision problems, the glasses you get may damage your eyesight in the long run because you fake the eye test and make the degrees in each of your eyes are totally not fit for the vision correction. Reading glasses are often used by senior citizens because they have presbyopia which is a kind of vision problem that can see the things in the distance but can't see the things in the nearby clearly.