The term eyestrain was undoubtedly invented in this country, but just when and by whom I do not know. If it has no other merit, it has that of satisfying patients. Their idea of what it means is indicated by such questions as, “Doctor do you find my eyes badly strained.” I suspect that it was the overemphasis placed by ophthalmologists on the importance of refractive errors that has led to the present unsatisfactory conditions relating to optometry. From what I have said, I hope no one will get the impression that I condone inaccurate refraction. In my own opinion, and in that of some of my patients, no one corrects refractive errors more precisely than I do.