Most doctors simply make money according to how much work they do. Therefor there is a big range in the amount that any one type of doctor can make. Neurosurgeons (brain surgeons) make around $300,000 to $1,000,000 per year.
A Doctor of Osteopathic Medicine (D.O.) makes the same amount of money as a Doctor of Medicine (M.D.) for the same position. What really determines how much a physician makes is what field they're specializing in, so it's very variable.
First it is not optomologist, it is optometrist and they usually make D$8000 per month. There is such thing as an optomologist. and optometrist isn't a medical doctor and a optomologist is one. Not sure how much they make though