The pharmaceutical industry's influence on the process of defining illness can be positive, as when drug companies increase public awareness of disease and develop effective therapies, or negative, if it pushes the boundaries of illness too far in pursuit of profit.
Good ethics and good business don’t have to be in conflict. Ophthalmologists shouldn’t resort to requiring their patients to buy contact lenses in-house; instead, they should focus on expanding their skill set and providing personalized service.