Again, I personally know of several Ophthalmologists that make 7-digits. Some of these guys are in their late-30's. And no, they don't own entire hospitals or whatever. So it is possible; but yes, you will have to own a large practice and make money off of your associates, do tons of surgery, own the ASC, own some opticals, make lots of business deals, etc. Obviously, I don't know of any associates/employees making that much money. Money should not be the prime driving force in any career, but it definitely is possible to make a salary in the 750k-1M range with some hard work, business acumen, and luck.
The "floor" of salaries is obviously ZERO -- i.e. if you don''t work. Again, "averages" are just that. There is a HUGE range of salaries for Ophthalmologists out there. From the part-timer associate who wants to spend more time with his/her kids...to the person that owns a refractive surgery franchise. No one is going to just give you money. You have to go out there and work hard, watch your expenses, make business deals to earn income passively, etc. There is no "set" salary, so try to get out of that mentality.