基于镜眼联合模型的单光镜片设计及制造

Design and manufacturing of single vision lens based on lens-eye joint model

  • 摘要: 针对现有单光镜片存在人眼实际感受屈光力不恒定的问题,提出了一种基于镜眼联合模型的单光镜片设计方法。将人眼视角变化与对应的镜片使用区域相匹配,以角膜表面人眼实际感受到的屈光度保持恒定为基准,对镜片表面的屈光度进行重新计算,最终获得镜片表面的屈光度分布及相应的面形数据。基于所提设计方法,以角膜表面实际感受到的屈光度−6.00 D为例,生成面形数据进行镜片加工,并对加工后的镜片面形及屈光度进行了测量和评价。测试结果表明:加工镜片的中心屈光度为−6.30 D,且呈中心向边缘渐变趋势,屈光度最大误差小于±0.23 D,验证了所提方法的有效性。

     

    Abstract: The commonly-used single vision lens has the problem of variational refractive power when it is worn and actually perceived. Response to this problem, a new design method based on lens-eye joint model for single vision lens was proposed. According to the new design method, the variational visual angles were matched to different areas of lens, and the constant perceived diopter on the corneal surface was set as precondition. The diopter on the lens surface was recomputed, and finally the diopter distribution and the corresponding surface shape data were obtained. Based on the proposed design method, the diopter of −6.00 D actually felt on the corneal surface was taken as an example to generate surface shape data for lens manufacturing, and the surface shape and diopter of the manufactured lens were measured and evaluated. The test results show that the central diopter of the manufactured lens is −6.30 D, the diopter values gradually vary from the center to the edge of the manufactured lens, and the maximum diopter error is smaller than ±0.23 D, which verifies the effectiveness of the proposed designed method.

     

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