角膜地形圖軟件分析及應(yīng)用課件

特檢室系列講座之五

角膜地形圖軟件分析及應(yīng)用胡亮2004.02.27主要結(jié)構(gòu)Placido盤投射系統(tǒng)實時圖像監(jiān)視系統(tǒng)計算機圖像處理系統(tǒng)原理等高線法分層設(shè)色法有關(guān)術(shù)語CIM（CornealIrregularrityMeasurement）SF（ShapeFactor）TKM（TheMeanToricKeratometry）有關(guān)術(shù)語CIM正常值0.03－0.68臨界值0.69－1.0異常值1.1－5.0有關(guān)術(shù)語TKM正常值43.1－45.9臨界值41.8－43.046.0－47.2異常值36.0－41.747.3－60.0有關(guān)術(shù)語ShapeFactor正常值0.13－0.35臨界值0.02－0.120.36－0.46異常值-1.0－0.010.47－1.0SingleDisplays

OD/OSCompareDisplay

OverViewDisplay

PathfinderCornealAnalysisNormalCornealDistortionSubclinicalkeratoconuskeratoconusCornealDistortion

Subclinicalkeratoconus

AdvancedRefractiveDiagnostics軸向圖axialmap測量曲率描述角膜整體形狀的簡單方式AdvancedRefractiveDiagnostics仰角圖Elevationmap描述與用毫米測量的參考表面比較在角膜“高度”或仰角的不同最與角膜表面匹配的合適球面被用作比較計算機將試著“適合”，或疊加此球面到角膜平面描述為用毫米測量的最適合球面和真是角膜可落在最適合參考球面的“上面”或“下面”數(shù)值可為正數(shù)或負數(shù)正仰角測量提示角膜表面在參考球面上方負的測量提示角膜表面在參考球面下正數(shù)對應(yīng)仰角圖上紅色或“暖”色，而負數(shù)對應(yīng)圖上的藍色或“冷”色AdvancedRefractiveDiagnostics不規(guī)則圖Irregularitymap與仰角圖相似使用最適合表面的方法消除眼睛的任何環(huán)面減去所有球面和柱面顯示可直接影響視力不規(guī)則度數(shù)值描述為“波前錯誤”wavefronterrorAdvancedRefractiveDiagnosticsHealingTrend/STARSMasterfitcontactlensmoduleReduceschairtimeandincreasesofficeefficiencyStreamlinestheoverallfittingprocessImprovesfittingselectionandfinallensperformancewithdifficultandspecialtyfitsEstablishesanelectroniclinkbetweendoctorandcontactlenslaboratoryCentralastigmatismSameperipheralastigmatismIrregularsatigmatismAsymmetricalThesameasymmetrical輸入數(shù)據(jù)透鏡參數(shù)修改透鏡設(shè)計和類型訂單檢查適應(yīng)癥角膜散