(Undated) -- May is Healthy Vision Month. Doctor Rachel Bishop is the chief of the Consult Services Section at the National Eye Institute. Doctor Bishop says the best way to keep your eyes healthy is to keep your entire body healthy. Eating a healthy diet and being smoke-free are some of the best ways to prevent problems with your eyes. Doctor Bishop says the number of diagnoses for eye conditions is on the rise, but the treatment for the conditions are getting better.