REVIEW. +2 to +3 D. Reading Glasses to Prevent Myopia.

Basic control theory equations are developed showing classical exponential system response of refraction vs. time R(t), with a characteristic system time constant, in response to a negative (-) step change of near work environmental conditions. Statistical analysis of retrospective data from 226 subjects is presented. It is shown that reasonable significance levels p < 0.001 can be obtained from relatively small sample sizes, over short time intervals. Details from preliminary experimental design using reading glasses at the U.S. Naval Academy at Annapolis are discussed. The conclusion is that positive (+) Add lenses, used as reading glasses during study, can prevent the development of myopia of college students in pilot training.