If you need glasses, the doctor will give you advice. The opticians in most hospitals are outsourced, that is to say, the level of opticians is not necessarily better than that of other opticians. You can find a store with a good reputation for service, so that no one will pay attention to you even if there is a problem or discomfort.
Simply put, the process is: hospital optometry to obtain accurate parameters-reliable glasses in optical shops.
The optometry time is about 40 minutes, the optician time is about 30 minutes, and the time for choosing glasses is counted separately.