If you really want to learn optometry and glasses technology, and strive to make every customer's eyes checked and glasses fitted, then it is recommended to go to optometry college for at least three years, and then consider opening your own shop after three to five years of internship.

If you don't consider technology, it's just to make money. In reality, some people have studied for a few months and learned a little fur before opening a shop, but such a shop can cope with a little difficulty, and it is very difficult to cultivate loyal big customers.