超高度近视镜片边缘厚度优化的对比分析研究

Comparative analysis of high myopia lens edge thickness optimization

观察折射率、几何中心位移量对-10.00DS以上的镜片边缘厚度的影响。事先采用"透镜边缘厚度计算公式"对屈光度从-10.00DS至-18.00DS(以每-1.00DS的频率递增)分3组模拟计算镜片边缘厚度。公式计算中瞳距均设定为67 mm,镜片中心厚度均采用1.3 mm,A组采用折射率为1.6657,镜架几何中心68 mm;B组采用折射率为1.6657,镜架几何中心70 mm;C组采用折射率为1.601,镜架几何中心68 mm;采用配对t检验比较各组镜片边缘厚度之间的差异。临床中采用A组配镜方案为25例等效球镜为-10.00DS以上近视患者配镜,采用配对t检验对比公式计算和加工后镜片边缘厚度数据,并调查配镜后患者满意率。根据A组、B组、C组配镜方案计算得到的镜片边缘厚度平均值分别为9.44±1.96 mm,10.96±2.37 mm,10.64±2.34 mm。B组配镜方案高于A组(P<0.01);C组配镜方案高于A组(P<0.01)。采用A组配镜方案为患者配镜,计算得到的镜片边缘厚度平均值8.45±3.08,临床实际加工后镜片边缘厚度平均值8.19±2.20,加工后镜片边缘与模拟值无显著差异(t=1.322,p>0.05)。问卷调查镜片厚度满意率98%,整体满意度100%。折射率与几何中心位移量对成品眼镜边缘厚度均有影响。在同等条件下瞳距与镜架几何中心相符的镜架镜片边缘厚度小,患者满意率高。

To observe the refractive index,the impact of the amount of displacement of the geometric center of the lens than-10. 00 DS edge thickness. prior use of 'lens edge thickness calculation formula'diopter from-10. 00 DS to-18. 00DS( per-1. 00 DS frequency increments) divided into three groups simulation lens edge thickness. Calculated in IPD are set to 67 mm,the lens center thickness are used 1. 3mm,A group with a refractive index of 1. 6657,the geometric center of the frame 68mm; group B refractive index of 1. 6657,the geometric center of the frame 70mm; group C the difference between the thickness of the lens edge test to compare each group using paired t; refractive index of1. 601,the geometric center of the frame 68 mm. A set of glasses used in the clinical program for 25 cases of spherical equivalent for-10. 00 DS more myopic glasses,after using a paired t test comparing calculated and processed lens edge thickness data,and patient satisfaction survey after the glasses. According to group A,group B,group C,the mean thickness of the lens edge program glasses were calculated 9. 44 ± 1. 96 mm,10. 96 ± 2. 37 mm,10. 64 ± 2. 34 mm.Group B optician program higher than group A( P<0. 01); group C program glasses higher than group A( P<0. 01). A group of programs for use in patients with glassesglasses,lens edge thickness of an average value calculated from 8. 45±3. 08,mean thickness of the lens edge machining after clinical practice 8. 19±2. 20,the lens edge was no significant difference between the simulated post-processing( t = 1. 322,p>0. 05). Lens thickness satisfaction survey 98% overall satisfaction 100%. The amount of displacement of the refractive index and the geometric center on the edge of the thickness of the finished glasses were affected. IPD small under the same conditions in line with the geometric center of the frame edge thickness of the lens frame,patient satisfaction rate.