If you took an economics course in college you learned about elasticity of demand - but it may be one of those academic theories that is quickly forgotten after the final exam. This economic concept does apply to optometric practice, however, and it may be especially helpful if you are thinking about raising your fees, or dropping an insurance plan (which is like raising your fees).
Without going into the mathematical formulas that are used to calculate elasticity of supply and demand, just think of it this way: if you raise your fees, and no one complains or stops coming to see you, the demand for your services is inelastic. It is good for a business to have inelastic demand, because it means that you could raise prices and most people will still buy from you. This may seem confusing because the well-known law of demand says that when the price of a good rises, the quantity demanded falls. While that may be generally true of a commodity, like sugar, it may not be so in eye exams. Elasticity of demand asks the question... if you raise prices, to what extent will demand drop?
In my experience, many optometrists enjoy fairly inelastic demand. I have often raised fees and found that no one seems to notice and demand for appointments remains as strong as ever. This is what we all work for when we try to build strong reputations for high quality, and when we develop strong patient loyalty. We work toward building a situation where the exams and eyeglasses we provide are not mere commodities.
The following factors influence elasticity of demand: