In terms of patient care what is better
a: A three tier system which has Doctors, Opticians and Dispensers. Doctors dealing with medical issues, Opticians who deal with refracting and Dispensers who dispense spectacles
b: A mainly 2 Tier system, with Doctors who refract and dispense and Opticians that dispense only
c: A system that lets Doctors refract, dispense and treat medical problems; that lets Opticians refract, perform further tests to diagnose eye problems, and dispense; that lets dispensers refract and dispense
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