角膜塑形镜配戴后瞳孔与光学区的大小对视觉质量的影响

发布时间：2018-06-01 12:20

本文选题：角膜塑形镜 + 视觉质量　；参考：《眼科新进展》2017年01期

【摘要】：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(P0.001),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P0.001);MTF cutoff下降(P0.001)。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P0.05)。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。
[Abstract]:Objective to investigate the changes of contrast sensitivity and modulation transfer function (MTF) cutoff frequency (MTF) after keratoplasty, and to analyze the effect of the size of pupil and optical area on the contrast sensitivity and MTF cutoff. Methods from August to December 2015, 40 myopic adolescents (40 eyes of right eye, 6 months after wearing a mirror) who were treated with corneal plastic lens in Tianjin Medical University Ophthalmology Hospital were selected to measure the corneal topography and pupil size of dark chamber. The size of optical area, area under contrast sensitivity curve and MTF cutoff. the changes of visual quality parameters before and after wearing mirror were matched t test. The influence of dark chamber pupil and optical area on visual quality parameters was analyzed by Pearson correlation. Results after 6 months of wear, the degree of equivalent spherical lens decreased by P 0.001, the degree of column lens did not change, and the contrast sensitivity of dark ventricle and the contrast sensitivity of cutoff decreased under the condition of dark ventricular glare (P 0.001) and P 0.001g / L respectively. The pupil diameter was 6.50 卤0.34 mm before and after wearing the mirror. The diameter of 6 moonlight school districts after wearing mirror was 4.05 卤0.24 mm. There was no correlation between the change of AULCSF and the diameter of pupil and optical area in dark chamber. There was no correlation between the change of AULCSF and the diameter of pupil and optical area of dark chamber. There was no correlation between the change of AULCSF and pupil diameter and optical area diameter of dark chamber under dark room glare and the diameter of pupil and optical area of dark chamber. There was no correlation between the change of AULCSF and pupil diameter of dark chamber and the diameter of optical area. The change of cutoff was related to the diameter of pupil of dark chamber and the diameter of optical area. Under dark ventricular glare, the changes of AULCSF and MTF cutoff were correlated with the difference of pupil diameter and optical area diameter (P0.05). Conclusion the contrast sensitivity and MTF cutoff of the dark chamber decreased after the corneal plastic lens was worn, and the smaller dark chamber pupil and the larger optical area could obtain better visual quality.
【作者单位】：天津医科大学眼科医院;
【基金】：天津科委自然科学基金资助(编号:11JCYBJC26000)~~
【分类号】：R778.11

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