Ask yourself a question and answer it. Do you satisfy the needs or the desires of your clients?
Nothing wrong if you answer “the needs”. Most of us would give more importance to necessities. However, if you ask me, people today have far fewer needs and far more unexpressed desires.
If you are an optician who believes needs are more important, then I will include you in the “metal” group: excellent at their job, but not inclined to think about those unexpected desires of the client. If you take the needs as a given, and give more importance to the desires, then you are a “spiritual” optician: one who looks not at bare facts but at the person in front of you.
If you are both, then I would say that you have understood the situation. Only opticians who manage both well will have a rosy future. Then you will be chosen in preference to the chains, e-commerce and discount stores , at least the ones who only focus on needs.
In a fluid society like today’s, optics as a profession will have a lot to do with the psychology beyond the obvious.