ObjectiveTo investigate the annual average myopic growth of different-aged youngsters in recent years.
MethodsBetween July 2010 and September 2011, 103 myopic youngsters (206 eyes) aged 7 to 18 years were recruited at the Ophthalmologic Department in West China Hospital. We measured their myopic diopter, and let them wear normal spectacles according to the measurement, and then measured their myopic diopter again half a year later. The difference between the two measurements was recorded and analyzed.
ResultsThe male group increased (-0.82±0.44) D per year, and the female group increased (-0.99±0.57) D per year, and the difference between the two groups had statistical significance (P<0.05). The male of 7 to 10 years old increased (-0.97±0.39) D per year, and of 11 to 14 years old increased (-0.92±0.41) D per year, and of 15 to 18 years old increased (-0.49±0.37) D per year, and the differences among the three male groups had statistical significances (P<0.01). The female of 7 to 10 years old increased (-1.22±0.46) D per year, and of 11 to 14 years old increased (-0.84±0.47) D per year, and of 15 to 18 years old increased (-0.61±0.67) D per year, and the differences had statistical significances (P<0.01).
ConclusionThe annual myopic growth of youngsters is related with age and sex. The growth of the female is faster than the male, and the younger also grows faster.
