Objectives:To investigate the short-and long-term effects of myopia control spectacle lenses with highly aspherical lenslets(HAL)and slightly aspherical lenslets(SAL)on visual function and visual quality using data ob...Objectives:To investigate the short-and long-term effects of myopia control spectacle lenses with highly aspherical lenslets(HAL)and slightly aspherical lenslets(SAL)on visual function and visual quality using data obtained from a randomized controlled clinical trial.Methods:This was a prospective,randomized,controlled,and double-blinded study;170 myopic children aged 8–13 years were randomly assigned to the HAL,SAL,or single-vision spectacle lenses(SVL)groups.Distance and near visual acuity(VA)at high(100%)and low(10%)contrast in photopic and scotopic conditions,near phoria,stereoacuity,and accommodative lag,microfluctuations(AMFs),amplitude(AA)were measured after wearing lenses for 10 min,6 months,and 12 months.Results:In total,161 subjects completed all follow-up in 12 months and were included in the analysis.After 10 min of wearing,the HAL and SAL groups had lower scotopic and low-contrast VA than the SVL group(decreased 0.03–0.08 logMAR and 0.01–0.04 logMAR in different VAs in the HAL and SAL groups,respectively,all P<0.05).The reduction in VA was recovered at 12 months as the HAL and SAL groups exhibited significant VA improvements,and the VA was not different among the three groups(all P>0.05).The HAL and SAL groups had significantly larger AMFs than the SVL group(HAL vs.SAL vs.SVL:0.21±0.08 D vs.0.16±0.05 D vs.0.15±0.06 D at baseline,0.19±0.07 D vs.0.17±0.05 D vs.0.13±0.07 D at 12 months,all P<0.05).There were no significant differences in accommodative lag,AA,or phoria between the groups(all P>0.05).The HAL and SAL groups had reduced stereoacuity compared to the SVL group at baseline(70’vs.60’vs.50’,P=0.005),but no difference was observed at 12 months(70’vs.70’vs.70’,P=0.11).Conclusions:HAL and SAL have no significant influence on accommodation and phoria except had larger AMF than SVL.Scotopic VA and low-contrast VA are reduced with short-term HAL and SAL use but recovered to be at same level with the SVL after 1 year of use.展开更多
目的探讨准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)前后患者隐斜和聚散功能变化。方法 von Graefe法测定36例(72眼)近视患者LASIK前、后隐斜和正、负融像性储备,统计分析并比较各测定值差异。结果术前戴镜远、近...目的探讨准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)前后患者隐斜和聚散功能变化。方法 von Graefe法测定36例(72眼)近视患者LASIK前、后隐斜和正、负融像性储备,统计分析并比较各测定值差异。结果术前戴镜远、近距隐斜分别为(-2.3871±2.0888)△、(-7.5161±4.5180)△,术后1个月裸眼远、近距隐斜分别为(-2.4355±1.4705)△、(-9.7984±4.3867)△,术前戴镜与术后1个月裸眼近距隐斜差异有显著统计学意义(t=-3.822,P<0.01);而术前戴镜与术后1个月裸眼远距隐斜差异无统计学意义(t=-0.142,P>0.05)。手术前、术后1个月远距正融像性储备分别是(13.2581±7.5805)△、(10.6774±7.3184)△,负融像性储备分别为(9.8710±4.3030)△、(9.9677±3.8777)△,近距正融像性储备分别是(21.2258±8.6283)△、(16.9032±6.9683)△,负融像性储备分别为(22.3871±5.4692)△、(22.5161±4.9724)△,手术前、术后1个月近距正融像性储备差异有显著统计学意义(t=2.937,P<0.01),其余指标变化差异均无统计学意义(均为P>0.05)。结论 LASIK术后1个月,近距外隐斜增大,正融像性储备减低,LASIK术前全面进行双眼视功能检查,评估用眼疲劳,必要时进行训练,可以提高手术后患者用眼舒适度。展开更多
AIM：To compare visual efficiency,specifically accommodation,vergence,and oculomotor functions among athletes and non-athletes.METHODS：A cross-sectional study on sports vision screening was used to evaluate the visua...AIM：To compare visual efficiency,specifically accommodation,vergence,and oculomotor functions among athletes and non-athletes.METHODS：A cross-sectional study on sports vision screening was used to evaluate the visual skills of 214elementary students（107 athletes,107 non-athletes）,aged between 13 and 16y.The visual screening assessed visual parameters such as ocular motor alignment,accommodation,and vergence functions.RESULTS：Mean visual parameters were compared between age-group matched athletes（mean age14.82±0.98y）and non-athletes（mean age 15.00±1.04y）.The refractive errors of all participants were corrected to maximal attainable best corrected visual acuity of log MAR0.0.Accommodation function assessment evaluated amplitude of accommodation and accommodation facility.Vergence functions measured the near point of convergence,vergence facility,and distance fusional vergence at break and recovery point.Ocular motor alignment was not statistically significant between both groups.Athletes had a statistically significant amplitude of accommodation for both the right eye（t=2.30,P=0.02）and the left eye（t=1.99,P=0.05）.Conversely,non-athletes had better accommodation facility（t=-2.54,P=0.01）and nearpoint of convergence（t=4.39,P〈0.001）when compared to athletes.Vergence facility was found to be better among athletes（t=2.47,P=0.01）.Nevertheless,non-athletes were significantly better for both distance negative and positive fusional vergence.CONCLUSION：Although the findings are still inconclusive as to whether athletes had superior visual skills as compared to non-athletes,it remains important to identify and elucidate the key visual skills needed by athletes in order for them to achieve higher performance in their sports.展开更多
基金supported by the International S&T Cooperation Program of China(Grant No.2014DFA30940)Collaborative research project with Essilor International(Wenzhou Medical University Grant Nos.95013006,95016010 and 95020005).
文摘Objectives:To investigate the short-and long-term effects of myopia control spectacle lenses with highly aspherical lenslets(HAL)and slightly aspherical lenslets(SAL)on visual function and visual quality using data obtained from a randomized controlled clinical trial.Methods:This was a prospective,randomized,controlled,and double-blinded study;170 myopic children aged 8–13 years were randomly assigned to the HAL,SAL,or single-vision spectacle lenses(SVL)groups.Distance and near visual acuity(VA)at high(100%)and low(10%)contrast in photopic and scotopic conditions,near phoria,stereoacuity,and accommodative lag,microfluctuations(AMFs),amplitude(AA)were measured after wearing lenses for 10 min,6 months,and 12 months.Results:In total,161 subjects completed all follow-up in 12 months and were included in the analysis.After 10 min of wearing,the HAL and SAL groups had lower scotopic and low-contrast VA than the SVL group(decreased 0.03–0.08 logMAR and 0.01–0.04 logMAR in different VAs in the HAL and SAL groups,respectively,all P<0.05).The reduction in VA was recovered at 12 months as the HAL and SAL groups exhibited significant VA improvements,and the VA was not different among the three groups(all P>0.05).The HAL and SAL groups had significantly larger AMFs than the SVL group(HAL vs.SAL vs.SVL:0.21±0.08 D vs.0.16±0.05 D vs.0.15±0.06 D at baseline,0.19±0.07 D vs.0.17±0.05 D vs.0.13±0.07 D at 12 months,all P<0.05).There were no significant differences in accommodative lag,AA,or phoria between the groups(all P>0.05).The HAL and SAL groups had reduced stereoacuity compared to the SVL group at baseline(70’vs.60’vs.50’,P=0.005),but no difference was observed at 12 months(70’vs.70’vs.70’,P=0.11).Conclusions:HAL and SAL have no significant influence on accommodation and phoria except had larger AMF than SVL.Scotopic VA and low-contrast VA are reduced with short-term HAL and SAL use but recovered to be at same level with the SVL after 1 year of use.
文摘目的探讨准分子激光原位角膜磨镶术(laser in situ keratomileusis,LASIK)前后患者隐斜和聚散功能变化。方法 von Graefe法测定36例(72眼)近视患者LASIK前、后隐斜和正、负融像性储备,统计分析并比较各测定值差异。结果术前戴镜远、近距隐斜分别为(-2.3871±2.0888)△、(-7.5161±4.5180)△,术后1个月裸眼远、近距隐斜分别为(-2.4355±1.4705)△、(-9.7984±4.3867)△,术前戴镜与术后1个月裸眼近距隐斜差异有显著统计学意义(t=-3.822,P<0.01);而术前戴镜与术后1个月裸眼远距隐斜差异无统计学意义(t=-0.142,P>0.05)。手术前、术后1个月远距正融像性储备分别是(13.2581±7.5805)△、(10.6774±7.3184)△,负融像性储备分别为(9.8710±4.3030)△、(9.9677±3.8777)△,近距正融像性储备分别是(21.2258±8.6283)△、(16.9032±6.9683)△,负融像性储备分别为(22.3871±5.4692)△、(22.5161±4.9724)△,手术前、术后1个月近距正融像性储备差异有显著统计学意义(t=2.937,P<0.01),其余指标变化差异均无统计学意义(均为P>0.05)。结论 LASIK术后1个月,近距外隐斜增大,正融像性储备减低,LASIK术前全面进行双眼视功能检查,评估用眼疲劳,必要时进行训练,可以提高手术后患者用眼舒适度。
基金Supported by the Ministry of Higher Education Malaysia Sports Grant[No.KPT.N.660-7 Jld 7(3)]UKM Research Code NN-2013-069
文摘AIM：To compare visual efficiency,specifically accommodation,vergence,and oculomotor functions among athletes and non-athletes.METHODS：A cross-sectional study on sports vision screening was used to evaluate the visual skills of 214elementary students（107 athletes,107 non-athletes）,aged between 13 and 16y.The visual screening assessed visual parameters such as ocular motor alignment,accommodation,and vergence functions.RESULTS：Mean visual parameters were compared between age-group matched athletes（mean age14.82±0.98y）and non-athletes（mean age 15.00±1.04y）.The refractive errors of all participants were corrected to maximal attainable best corrected visual acuity of log MAR0.0.Accommodation function assessment evaluated amplitude of accommodation and accommodation facility.Vergence functions measured the near point of convergence,vergence facility,and distance fusional vergence at break and recovery point.Ocular motor alignment was not statistically significant between both groups.Athletes had a statistically significant amplitude of accommodation for both the right eye（t=2.30,P=0.02）and the left eye（t=1.99,P=0.05）.Conversely,non-athletes had better accommodation facility（t=-2.54,P=0.01）and nearpoint of convergence（t=4.39,P〈0.001）when compared to athletes.Vergence facility was found to be better among athletes（t=2.47,P=0.01）.Nevertheless,non-athletes were significantly better for both distance negative and positive fusional vergence.CONCLUSION：Although the findings are still inconclusive as to whether athletes had superior visual skills as compared to non-athletes,it remains important to identify and elucidate the key visual skills needed by athletes in order for them to achieve higher performance in their sports.
