Which is most highest- paying?

1) Dental 2) Health care professional- provide medical equipment, medical supplies, and health care. 3) Eye care professional- Vision
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If by dental you mean being a Dentist, that would be your choice followed by an Optometrist. You have to go full doctor or your wasting your time. A Dentist will always be busy as everyone gets their teeth cleaned on a regular basis and has other work done. People tend to put off the eye doctor until absolutely necessary.
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