Comparison of American optical SR-IV refractive data with clinical refractive data on a group of myopic children.

Previous studies involving the American Optical SR-III Subjective Refraction System have indicated that refractive data for adults and for populations of mixed age groups compare favorably with conventional refractive data. However, no data concerning children, as a group, have been available. As a part of a 3-year Myopia Control Study being conducted at the University of Houston, 131 myopes between the ages of 6 and 15 years have been refracted by means of both the redesigned SR-IV Programmed Subjective Refractor and conventional clinical procedures. The results indicated that for the majority of subjects, the refractive data obtained by means of the SR-IV differed by no more than 0.25 D from data obtained by conventional procedures. SR-IV and clinical refractive data were also compared for a group of 30 second year optometry students, and agreement for the two methods was found to compare favorably with agreement of clinical refractive data obtained by two or more examiners.