title: Plus lenses, prisms, and bifocal effects on myopia progression in military students.
abstract: Students of the Naval Academy Preparatory School (NAPS) class of 1978 to 1979 were randomly divided into three groups, one-third of the class receiving their correlation for distant vision with a no. 1 pink tint to be used for reading (the placebo group); one-third of the class receiving +1.25 D added to their distance correction with 2 delta base-in each eye, in glasses to be used for reading; and one-third of the class receiving bifocals, incorporating their distance correction with a +1.50 D near addition. The refractive error at distance for all 232 students was determined under cycloplegia. At the end of 5 months, a repeat cycloplegic refraction showed nonsignificant myopic shifts (Wilcoxon test) of -0.08 +/- 0.29 D in the placebo group, -0.07 +/- 0.25 D in the plus-with-prism group, and -0.06 +/- 0.18 D in the bifocal group. This research note is preliminary to a followup at academic graduation of these same students from the Naval Academy in 1983.
mesh_terms: D000293:Adolescent; D000328:Adult; D005139:Eyeglasses / Q000592:standards*; D006801:Humans; D008297:Male; D009216:Myopia / Q000175:diagnosis / Q000628:therapy*