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.
ObjectiveTo study whether the pattern visual evoked potential (P-VEP) under different spatial frequency in patients with multiple sclerosis (MS) is different from normal people. MethodsP-VEP examination under high (15') and low (60') spatial frequency was performed on 18 MS patients (36 eyes) treated in our department from September 2011 to April 2012 and 20 normal volunteers (40 eyes). Then, we analyzed the difference between the two groups under the above-mentioned two kinds of spatial frequency. ResultsThe latency of P100 of P-VEP under high spatial frequency in MS patients was (120.50±13.04) ms which was significantly different from (109.21±5.38) ms of normal volunteers (P < 0.05). The latency of P100 of P-VEP under low spatial frequency in MS patients was (109.57±12.87) ms, which was also significantly different from (103.31±5.45) ms of normal volunteers (P < 0.05). The amplitude of P100 of P-VEP under high spatial frequency in MS patients was (9.17±5.69)μV and it was significantly lower than that[(15.69±8.45)μv] of normal volunteers (P < 0.05). The amplitude of P100 of P-VEP under low spatial frequency in MS patients was (11.93±16.75)μV and it was not significantly different from normal volunteers[(13.47±9.24μV)]. Based on different corrected vision, the MS patients were divided into two groups (vision≥1.0 and vision < 1.0). For patients with vision≥1.0, the latency of P100 and the amplitude of P100 of P-VEP under high spatial frequency was (113.43±8.28) ms and (12.94±5.46)μV; the latency of P100 and the amplitude of P100 of P-VEP under low spatial frequency was (111.13±11.50) ms and (11.57±5.60)μV. For patients with vision < 1.0, the latency of P100 and the amplitude of P100 of P-VEP under high spatial frequency was (126.69±13.49) ms and (5.87±3.43)μV; the latency of P100 and the amplitude of P100 of P-VEP under low spatial frequency was (108.26±14.11) ms and (12.24±5.82)μV. There was no significant difference in the latency and amplitude of P100 under low spatial frequency between the two groups with different corrected vision (P > 0.05), but the latency and amplitude of P100 under high spatial frequency were both significantly different between those two groups (P < 0.05). ConclusionsCompared with normal people, MS patients feature latency delay and amplitude reduction of the P-VEP, which was more severe under high spatial frequency. P-VEP under high spatial frequency may become an important evidence to evaluate visual function of MS patients.
Optometry has become the second class course under the allied health professions since 2012, and has been the National undergraduate enrollment directory. According to the definition of optometry provided by the World Council of Optometry, the jobs of optometrist in China include the basic eye care, basic optometry, contact lens fitting, binocular vision anomaly treatment, strabismus and amblyopia treatment, low vision treatment, special ocular examination, maintenance of equipment related to optometry, operation and sales management. At present, the demand of professional optometrist is great. However, the development of optometrical education is limited by the lack of professional ranks. The professional ranks and titles for optometrist, corresponding registration and examination system should be established by the Ministry of Health as soon as possible, in order for the development of optometrical education and human resource management.