新眼鏡度數跟舊眼鏡一樣 但是比較不清楚 - 眼鏡
By Olive
at 2016-03-13T20:55
at 2016-03-13T20:55
Table of Contents
我就用我可以計算的下去計算
首先就先計算球面度數的有效度
舊的右眼度數-11.00頂間距約莫13mm換算後大約是-9.62度
新的右眼度數-11.00頂間距約莫15mm換算後大約是-9.44度
舊的左眼度數-10.50頂間距約莫13mm換算後大約是-9.23度
新的左眼度數-10.50頂間距約莫13mm換算後大約是-9.07度
總結
新的右眼度數少了約莫-0.18度
新的左眼度數少了約莫-0.16度
一般計算眼鏡度數是低於-0.12 則少25度 高於-0.12 則多25度
舉例來說
-3.10度一般會判斷為3.00度
-3.15度則會判斷成為3.25度
所以原po的度數來說兩眼都差25度
再來換計算稜鏡偏移量的問題
舊眼鏡的PD為62mm新的眼鏡PD為63.5
也就是往耳側偏移了1.5mm
由於是凹透鏡基底方向與鏡片偏心的方向相反
帶入△=CF
右眼 △=(0.15)X(11)=1.65△BI 也就是1.65個稜鏡基底朝內
左眼 △=(0.15)X(10.5)=1.5△BI 也就是1.5個稜鏡基底朝內
再來如果要下稜鏡一般都會以測量出來的三分之一來下
所以舊眼鏡跟新眼鏡度數是一定的差異的。
--
首先就先計算球面度數的有效度
舊的右眼度數-11.00頂間距約莫13mm換算後大約是-9.62度
新的右眼度數-11.00頂間距約莫15mm換算後大約是-9.44度
舊的左眼度數-10.50頂間距約莫13mm換算後大約是-9.23度
新的左眼度數-10.50頂間距約莫13mm換算後大約是-9.07度
總結
新的右眼度數少了約莫-0.18度
新的左眼度數少了約莫-0.16度
一般計算眼鏡度數是低於-0.12 則少25度 高於-0.12 則多25度
舉例來說
-3.10度一般會判斷為3.00度
-3.15度則會判斷成為3.25度
所以原po的度數來說兩眼都差25度
再來換計算稜鏡偏移量的問題
舊眼鏡的PD為62mm新的眼鏡PD為63.5
也就是往耳側偏移了1.5mm
由於是凹透鏡基底方向與鏡片偏心的方向相反
帶入△=CF
右眼 △=(0.15)X(11)=1.65△BI 也就是1.65個稜鏡基底朝內
左眼 △=(0.15)X(10.5)=1.5△BI 也就是1.5個稜鏡基底朝內
再來如果要下稜鏡一般都會以測量出來的三分之一來下
所以舊眼鏡跟新眼鏡度數是一定的差異的。
--
Tags:
眼鏡
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