目的探讨飞秒激光辅助白内障手术对高度近视合并白内障患者囊袋稳定性及人工晶状体(intraocularlens,IOL)有效位置的影响。方法应用前瞻性队列研究法,收集上海新视界眼科医院2019年7月—10月收治的高度近视合并白内障患者39例(60眼),分...目的探讨飞秒激光辅助白内障手术对高度近视合并白内障患者囊袋稳定性及人工晶状体(intraocularlens,IOL)有效位置的影响。方法应用前瞻性队列研究法,收集上海新视界眼科医院2019年7月—10月收治的高度近视合并白内障患者39例(60眼),分为飞秒激光辅助白内障手术组(飞秒组)16例26眼和传统白内障超声乳化吸除术(对照组)23例34眼。应用Pentacam三维眼前节成像系统及Image Pro Plus软件测量术后1周、1、3个月前房深度、前囊口直径、人工晶状体偏心量及倾斜度。结果术后1周、1、3个月飞秒组IOL水平偏心量明显低于对照组,差异有统计学意义(P=0.029,0.002)。术后1、3个月飞秒组IOL水平倾斜角低于对照组,差异有统计学意义(P=0.008,0.006)。不同时间点两组术后前房深度、垂直偏心量及垂直倾斜角差异均无统计学意义(P>0.05)。飞秒组术后3个月与术后1周前囊口水平直径变化量、水平偏心变化量、水平及垂直倾斜角变化量、前房深度变化量均低于对照组,差异有统计学意义(P<0.05),而垂直直径及IOL垂直偏心变化量差异无统计学意义(P>0.05)。结论在高度近视并发白内障人群中,飞秒激光辅助白内障手术减少前囊膜收缩程度,增强人工晶状体在囊袋内的稳定性。展开更多
Taking the communities of the sample sites in Aershan of Inner Mongolia as an investigation object, the indices affecting plant diversity were studied. The investigation was carried out in three different forest types...Taking the communities of the sample sites in Aershan of Inner Mongolia as an investigation object, the indices affecting plant diversity were studied. The investigation was carried out in three different forest types （natural forests, plantations and regenerated forests after fire）. Results show that 95 plant species belonging to 19 families and 50 genera were identified in total. Of these species, nine were arbors, six were shrubs and the other 80 were herbs. We found some differences in the dominant species of different layers in three forest types. Natural forests had the largest importance value for the total number of species, followed by plantations and regenerated forests after fire. Plantations and natural forests had a similar change in richness indices. The largest value of richness indices was obtained in natural forests, while the lowest value was in regenerated forests after fire. Three diversity indices （Simpson＇s, Shannon-Wiener and Pielou＇s indices） indicate a similar trend in all sample plots. With an increase in elevation, values of diversity indices first increased and then decreased. In different forest types, similarity between natural forests was largest, while similarity between the regenerated forests and plantations was lowest.展开更多
文摘目的探讨飞秒激光辅助白内障手术对高度近视合并白内障患者囊袋稳定性及人工晶状体(intraocularlens,IOL)有效位置的影响。方法应用前瞻性队列研究法,收集上海新视界眼科医院2019年7月—10月收治的高度近视合并白内障患者39例(60眼),分为飞秒激光辅助白内障手术组(飞秒组)16例26眼和传统白内障超声乳化吸除术(对照组)23例34眼。应用Pentacam三维眼前节成像系统及Image Pro Plus软件测量术后1周、1、3个月前房深度、前囊口直径、人工晶状体偏心量及倾斜度。结果术后1周、1、3个月飞秒组IOL水平偏心量明显低于对照组,差异有统计学意义(P=0.029,0.002)。术后1、3个月飞秒组IOL水平倾斜角低于对照组,差异有统计学意义(P=0.008,0.006)。不同时间点两组术后前房深度、垂直偏心量及垂直倾斜角差异均无统计学意义(P>0.05)。飞秒组术后3个月与术后1周前囊口水平直径变化量、水平偏心变化量、水平及垂直倾斜角变化量、前房深度变化量均低于对照组,差异有统计学意义(P<0.05),而垂直直径及IOL垂直偏心变化量差异无统计学意义(P>0.05)。结论在高度近视并发白内障人群中,飞秒激光辅助白内障手术减少前囊膜收缩程度,增强人工晶状体在囊袋内的稳定性。
基金supported by Biodiversity and Forest Pest Problems in northeast China (BIOPROC)a cooperative project between Beijing Forestry University and Helsinki Universitythe Program for Changjiang Scholars and Innovative Research Team in Universities (PCSIRT0607)
文摘Taking the communities of the sample sites in Aershan of Inner Mongolia as an investigation object, the indices affecting plant diversity were studied. The investigation was carried out in three different forest types （natural forests, plantations and regenerated forests after fire）. Results show that 95 plant species belonging to 19 families and 50 genera were identified in total. Of these species, nine were arbors, six were shrubs and the other 80 were herbs. We found some differences in the dominant species of different layers in three forest types. Natural forests had the largest importance value for the total number of species, followed by plantations and regenerated forests after fire. Plantations and natural forests had a similar change in richness indices. The largest value of richness indices was obtained in natural forests, while the lowest value was in regenerated forests after fire. Three diversity indices （Simpson＇s, Shannon-Wiener and Pielou＇s indices） indicate a similar trend in all sample plots. With an increase in elevation, values of diversity indices first increased and then decreased. In different forest types, similarity between natural forests was largest, while similarity between the regenerated forests and plantations was lowest.
