目的探究角膜塑形镜治疗后暗室对比敏感度与调制传递函数截止频率(modulation transfer function cutoff,MTF cutoff)变化,并分析瞳孔与光学区的大小对暗室下对比敏感度以及MTF cutoff的影响。方法选取2015年8月至12月在天津医科大学眼...目的探究角膜塑形镜治疗后暗室对比敏感度与调制传递函数截止频率(modulation transfer function cutoff,MTF cutoff)变化,并分析瞳孔与光学区的大小对暗室下对比敏感度以及MTF cutoff的影响。方法选取2015年8月至12月在天津医科大学眼科医院进行角膜塑形镜治疗的近视青少年40人(右眼40眼),戴镜前、戴镜后6个月分别测量角膜地形图、暗室瞳孔大小、光学区大小、暗室及暗室眩光条件下对比敏感度曲线下面积(area under log contrast sensitivity function,AULCSF)及MTF cutoff,戴镜前后视觉质量参数变化采用配对t检验,暗室瞳孔与光学区对视觉质量参数的影响采用Pearson相关分析。结果戴镜后6个月等效球镜度数降低(P<0.001),柱镜度数无变化(P=0.879);暗室对比敏感度及暗室眩光条件下对比敏感度均下降(均为P<0.001);MTF cutoff下降(P<0.001)。戴镜前后瞳孔直径为(6.50±0.34)mm。戴镜后6个月光学区直径为(4.05±0.24)mm。暗室条件下AULCSF变化与暗室瞳孔直径及光学区直径均不相关(r=0.159,P=0.307;r=-0.223,P=0.167),暗室眩光条件下AULCSF变化与暗室瞳孔直径及光学区直径均不相关(r=0.174,P=0.289;r=-0.200,P=0.216)。MTF cutoff变化与暗室瞳孔直径及光学区直径相关(r=0.509,P=0.001;r=-0.511,P=0.001),暗室、暗室眩光条件下AULCSF及MTF cutoff变化均与瞳孔直径和光学区直径之差相关(均为P<0.05)。结论角膜塑形镜配戴后暗室对比敏感度及MTF cutoff均降低,且较小的暗室瞳孔与较大的光学区可获得更好的视觉质量。展开更多
AIM:To compare the visual performance of pseudophakic eyes implanted with Al-UV and SN60WF aspheric intraocular lens(IOL),and to investigate the correlations between visual quality parameters and pupil size.METHODS:Th...AIM:To compare the visual performance of pseudophakic eyes implanted with Al-UV and SN60WF aspheric intraocular lens(IOL),and to investigate the correlations between visual quality parameters and pupil size.METHODS:This prospective comparative study included 105 eyes of 90 patients with age-related cataract who underwent uneventful phacoemulsification.The subjects were divided into two groups according to the implanted IOL type.Three months postoperatively,visual acuity and contrast sensitivity were measured,wave-front aberrations were assessed using a KR-IW aberrometer(Topcon),and objective optical quality parameters were performed using an optical quality analysis system-OQAS Il(Visiometrics).Independent sample Mest and Spearman correlation analysis were used for data analysis.RESULTS:There were no significant differences found in visual acuity,contrast sensitivity and visual quality parameters between the two groups(P>0.05).The measured intraocular spherical aberration(SA)in Al-UV IOL eyes of-0.19±0.05 pm was close to the designed SA value of-0.20 pm.The modulation transfer function cutoff,Strehl ratio and OQAS values were negatively correlated with pupil size in both groups(P<0.01).CONCLUSION:The subjective and objective visual quality in pseudophakic eyes with A1-UV and SN60WF IOLs are comparable.For aspheric IOL eyes,visual quality decreases with increasing pupil size.展开更多
基金Supported by Project of Science&Technology Department of Sichuan Province(No.2019YJ0381)Key Project of Sichuan Health and Family Planning Commission(No.18ZD022).
文摘AIM:To compare the visual performance of pseudophakic eyes implanted with Al-UV and SN60WF aspheric intraocular lens(IOL),and to investigate the correlations between visual quality parameters and pupil size.METHODS:This prospective comparative study included 105 eyes of 90 patients with age-related cataract who underwent uneventful phacoemulsification.The subjects were divided into two groups according to the implanted IOL type.Three months postoperatively,visual acuity and contrast sensitivity were measured,wave-front aberrations were assessed using a KR-IW aberrometer(Topcon),and objective optical quality parameters were performed using an optical quality analysis system-OQAS Il(Visiometrics).Independent sample Mest and Spearman correlation analysis were used for data analysis.RESULTS:There were no significant differences found in visual acuity,contrast sensitivity and visual quality parameters between the two groups(P>0.05).The measured intraocular spherical aberration(SA)in Al-UV IOL eyes of-0.19±0.05 pm was close to the designed SA value of-0.20 pm.The modulation transfer function cutoff,Strehl ratio and OQAS values were negatively correlated with pupil size in both groups(P<0.01).CONCLUSION:The subjective and objective visual quality in pseudophakic eyes with A1-UV and SN60WF IOLs are comparable.For aspheric IOL eyes,visual quality decreases with increasing pupil size.
