本研究以測量鏡片全表面高度的非光學檢測方法來評估漸進多焦點鏡片的光學特性，包括等價球面度數、散光度數，及高階像差。同時探討在不同測量密度下，對其所呈現之光學特性的影響。本研究使用精密的接觸式三次元量床來測量漸進多焦點鏡片前表面的高度分佈，所檢測的漸進多焦點鏡片為前表面漸進多焦自由曲面、後表面球面的光學設計，規格為遠方正視(0.00D)、近方加入度數+2.00D的CR-39鏡片。在直徑61mm的鏡片面積範圍內，設計900~25,600個測量點(0.31~8.76點/mm2或1.80~0.34mm/點)，然後將不同測量密度所測得的全表面高度數據，透過MATLAB程式計算轉化為代表像差曲面形狀的Zernike多項式組合，進而分析出此鏡片的等價球面度數、散光度數，及高階像差分佈。研究結果顯示當測量密度不低於3,600點(≥1.23點/mm2或≤0.9mm/點)時，其所測得的光學特性將差異不大。故建議在以非光學之接觸式三次元檢測技術來評估漸進多焦點鏡片的光學特性時，可將1.23點/mm2或0.9mm/點之測量密度設為臨界測量密度，以提升檢測效率。

This study evaluated progressive addition lenses (PALs) by measuring the whole-surface height of the lens, which is a non-optical method to characterize the optical properties of PALs including the spherical equivalent, astigmatism, and higher order aberrations (HOAs). Meanwhile, the effect of measuring sample density on the optical properties was also investigated. This study used a contact-type coordinate measuring machine (CMM) to measure the front surface height of a CR-39 PAL which has the freeform, progressive front surface and spherical back surface lens design with plano (0.00 D) distance power and a +2.00 D add power. Within the tested area of 61 mm in diameter, 900 ~ 25,600 samples per lens (0.31~8.76 samples/mm2 or 1.80~0.34 mm/sample) were developed for surface height measurement. The data measured from different sample density were subsequently imported into MATLAB for analysis to derive a representation of surface shape described as the sum of Zernike polynomials. The characterization of the PAL was represented as contour plots of spherical equivalent, astigmatism, and higher order aberrations. The results show that there are no obvious differences in optical properties of the tested PAL when the sample number is no less than 3,600 (≥1.23 samples/mm2 or ≤0.9 mm/sample). It is implied that the sample density of 1.23 samples/mm2 or 0.9 mm/sample can be used as a critical sample density to enhance the inspection efficiency when a PAL is evaluated by the CMM method.