眼睛焦距造成菱鏡跟散光軸的關係 - 眼鏡
By Bennie
at 2015-08-03T15:07
at 2015-08-03T15:07
Table of Contents
※ 引述《aummy (總是在笑的小明)》之銘言:
: 這一兩天配了一副新眼鏡戴起來右眼模糊但是左眼清晰戴起來覺得不舒服
: 舊眼鏡 右 1200度 散光250 左 1250 散光200
: 新眼鏡 右 1250度 散光350 左1250 散光250
: 眼鏡行是說有吧焦距從舊眼鏡的6.35改成正確的6.6,說這樣會有菱鏡效應要帶幾天讓眼睛適應對焦
簡單的說明下概念
就依照眼鏡行的邏輯推論
△(稜鏡效應量)=D(度數)*h(位移量cm)
假設 新眼鏡單眼瞳距3.3cm是正確的 舊單眼瞳距3.175cm
先用舊眼鏡度數來比較一下 新舊瞳孔距離 在眼鏡配戴上會產生怎樣的稜鏡量
正確的單眼瞳距與舊的單眼瞳距相比較後
得知 舊眼鏡的瞳孔位置往鼻側靠近
就是產生基底朝外影像向內偏移的稜鏡出現 Base Out(這是稜鏡具有方向性)
舊眼鏡 右眼 稜鏡效應量=12*(3.3-3.175)=1.5△BO
左眼 稜鏡效應量=12.5*(3.3-3.175)=1.56△BO
由此可知在帶舊眼鏡時由於瞳孔位置不是正確的時候
其實這原PO已經戴了共是1.5+1.56=3.06△BO 稜鏡處方效果的眼鏡
倘若原PO的眼位皆是正位 當時的處方也都是正確的
那麼這副舊眼鏡照理說 會不是那麼好戴的
很多個案裡 確實是在自己不知道的情況底下加上年輕 久了也習慣了 這是常見的
好~新眼鏡的稜鏡效應量是不是也會計算了呢?
完整的驗光流程跑完後 眼位也都在正位的情況下
鏡片光心已經對準瞳孔了 一般來說就不該有啥稜鏡效應量
但問題來了 假設6.6CM的瞳距為準確 度數也正確的情況底下
怎麼新眼鏡戴起來就是怪怪的
那可能就是該眼睛行所說的論點
在舊的配戴習慣上 自己已經習慣使用更多的內聚力 一時回到正常 反覺得怪
這有點像我們一直在爬樓梯 自己沒意識已經到了平台 依舊用爬樓梯的節奏與力道
踩空般的難受 甚至不小心會重心不穩跌倒的感覺
可以理解成原本看東西必須要用更多力氣 突然解除了會很不適應
通常這樣的狀態
完整的驗光檢查加上耐心的比對新舊處方的差異 充分的與朋友溝通是很重要的
也是新眼鏡要能好戴 很重要的關鍵
以上是小弟拙見 若不對處 前輩們再多多指教 鞭之也無妨^^
: 然後我帶新眼鏡看下面這張驗散光的圖,發現數字2的線條特別黑其他都很淡,舊眼鏡則是各個線條差不多黑
: http://miupix.cc/pm-6SMV9E
: 想請問是因為如眼鏡行所說的菱鏡效應造成的還是散光度數沒配好?
倘若在新眼鏡兩隻眼睛 分別單眼看鐘面圖都存有這樣的問題
而舊眼鏡卻是線條一樣清楚(其實就是散光矯正完畢)
應該是在處方上的已經存在著問題了
特別您是高度近視高度散光 更必須精軸精度 差一點都會影響視力品質的
可以回原店家再幫您檢查確認一下!!
: 另外菱鏡效應會造成散光軸度的影響嗎
我認為會 但是不該出現在一般光學鏡架上
這部分還得有請K大解釋了^^
--
: 這一兩天配了一副新眼鏡戴起來右眼模糊但是左眼清晰戴起來覺得不舒服
: 舊眼鏡 右 1200度 散光250 左 1250 散光200
: 新眼鏡 右 1250度 散光350 左1250 散光250
: 眼鏡行是說有吧焦距從舊眼鏡的6.35改成正確的6.6,說這樣會有菱鏡效應要帶幾天讓眼睛適應對焦
簡單的說明下概念
就依照眼鏡行的邏輯推論
△(稜鏡效應量)=D(度數)*h(位移量cm)
假設 新眼鏡單眼瞳距3.3cm是正確的 舊單眼瞳距3.175cm
先用舊眼鏡度數來比較一下 新舊瞳孔距離 在眼鏡配戴上會產生怎樣的稜鏡量
正確的單眼瞳距與舊的單眼瞳距相比較後
得知 舊眼鏡的瞳孔位置往鼻側靠近
就是產生基底朝外影像向內偏移的稜鏡出現 Base Out(這是稜鏡具有方向性)
舊眼鏡 右眼 稜鏡效應量=12*(3.3-3.175)=1.5△BO
左眼 稜鏡效應量=12.5*(3.3-3.175)=1.56△BO
由此可知在帶舊眼鏡時由於瞳孔位置不是正確的時候
其實這原PO已經戴了共是1.5+1.56=3.06△BO 稜鏡處方效果的眼鏡
倘若原PO的眼位皆是正位 當時的處方也都是正確的
那麼這副舊眼鏡照理說 會不是那麼好戴的
很多個案裡 確實是在自己不知道的情況底下加上年輕 久了也習慣了 這是常見的
好~新眼鏡的稜鏡效應量是不是也會計算了呢?
完整的驗光流程跑完後 眼位也都在正位的情況下
鏡片光心已經對準瞳孔了 一般來說就不該有啥稜鏡效應量
但問題來了 假設6.6CM的瞳距為準確 度數也正確的情況底下
怎麼新眼鏡戴起來就是怪怪的
那可能就是該眼睛行所說的論點
在舊的配戴習慣上 自己已經習慣使用更多的內聚力 一時回到正常 反覺得怪
這有點像我們一直在爬樓梯 自己沒意識已經到了平台 依舊用爬樓梯的節奏與力道
踩空般的難受 甚至不小心會重心不穩跌倒的感覺
可以理解成原本看東西必須要用更多力氣 突然解除了會很不適應
通常這樣的狀態
完整的驗光檢查加上耐心的比對新舊處方的差異 充分的與朋友溝通是很重要的
也是新眼鏡要能好戴 很重要的關鍵
以上是小弟拙見 若不對處 前輩們再多多指教 鞭之也無妨^^
: 然後我帶新眼鏡看下面這張驗散光的圖,發現數字2的線條特別黑其他都很淡,舊眼鏡則是各個線條差不多黑
: http://miupix.cc/pm-6SMV9E
: 想請問是因為如眼鏡行所說的菱鏡效應造成的還是散光度數沒配好?
倘若在新眼鏡兩隻眼睛 分別單眼看鐘面圖都存有這樣的問題
而舊眼鏡卻是線條一樣清楚(其實就是散光矯正完畢)
應該是在處方上的已經存在著問題了
特別您是高度近視高度散光 更必須精軸精度 差一點都會影響視力品質的
可以回原店家再幫您檢查確認一下!!
: 另外菱鏡效應會造成散光軸度的影響嗎
我認為會 但是不該出現在一般光學鏡架上
這部分還得有請K大解釋了^^
--
Tags:
眼鏡
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