中国实用眼科杂志
中國實用眼科雜誌
중국실용안과잡지
CHINESE JOURNAL OF PRACTICAL OPHTHALMOLOGY
2013年
1期
24-28
,共5页
巩晨%马忠旭%甄小妹%王新%姜丽丽
鞏晨%馬忠旭%甄小妹%王新%薑麗麗
공신%마충욱%견소매%왕신%강려려
全眼球差%截止空间频率%斯特尔比率%焦深
全眼毬差%截止空間頻率%斯特爾比率%焦深
전안구차%절지공간빈솔%사특이비솔%초심
Entire spherical aberration%MTF cut-off frequency%Sterol ratio%DOF
目的 探讨白内障联合人工晶状体(IOL)植入术后全眼球差对焦深及客观视觉质量的影响.方法 回顾性病例研究.收集2011年9月至2012年3月在天津市眼科医院就诊的年龄相关白内障联合人工晶状体植入术后3个月患者80例(140只眼).非球面IOL眼110只眼,球面IOL眼30只眼.对5 mm瞳孔下非球面IOL全眼球差进行分三组,Ⅰ组(-0.1 μm≤SA＜0.05 μm) 32只眼,Ⅱ组(0.05μm≤SA＜0.15 μm) 38只眼,Ⅲ组(0.15 μm≤SA＜0.4 μm)40只眼,用i-Trace波前像差仪测量全眼像差及角膜像差进行像差分析.使用VOL-CT软件,+2.00～-2.00 D,经过焦点分析绘制斯特尔比率(Ste-rol Ratio,SR)曲线,对比不同球差组的离焦.去除散光后,根据离焦计算斯特尔比率,同时从该软件可以获得调制传递函数(modulation transfer function,MTF)截止空间频率.SR和MTF截止空间频率作为评价光学质量的标准.我们所测的焦深(depth of focus,DOF)值是按大于等于SR最大值80％的离焦范围计算.分析非球面IOL不同全眼球差组对焦深及视觉质量的影响并同球面IOL组比较.结果 5 mm瞳孔直径下非球面IOL组MTF截止空间频率和斯特尔率比球面IOL组有所增加,其中非球面IOLII组(0.05 μm≤SA＜0.15 μm)比Ⅰ、Ⅲ组均有轻度的增加,然而球面IOL组焦深最大.SR随球差的增加而减小,焦深与全眼球差成正相关.结论 白内障术后余留一定全眼球差(约+0.08 μm)可以改善视觉质量,同时有较好的矫正远距离的近距离视力及阅读能力.最终全眼球差在0.07～0.1 μm时可以获得较好的视网膜成像质量及较高的离焦耐受性.
目的 探討白內障聯閤人工晶狀體(IOL)植入術後全眼毬差對焦深及客觀視覺質量的影響.方法 迴顧性病例研究.收集2011年9月至2012年3月在天津市眼科醫院就診的年齡相關白內障聯閤人工晶狀體植入術後3箇月患者80例(140隻眼).非毬麵IOL眼110隻眼,毬麵IOL眼30隻眼.對5 mm瞳孔下非毬麵IOL全眼毬差進行分三組,Ⅰ組(-0.1 μm≤SA＜0.05 μm) 32隻眼,Ⅱ組(0.05μm≤SA＜0.15 μm) 38隻眼,Ⅲ組(0.15 μm≤SA＜0.4 μm)40隻眼,用i-Trace波前像差儀測量全眼像差及角膜像差進行像差分析.使用VOL-CT軟件,+2.00～-2.00 D,經過焦點分析繪製斯特爾比率(Ste-rol Ratio,SR)麯線,對比不同毬差組的離焦.去除散光後,根據離焦計算斯特爾比率,同時從該軟件可以穫得調製傳遞函數(modulation transfer function,MTF)截止空間頻率.SR和MTF截止空間頻率作為評價光學質量的標準.我們所測的焦深(depth of focus,DOF)值是按大于等于SR最大值80％的離焦範圍計算.分析非毬麵IOL不同全眼毬差組對焦深及視覺質量的影響併同毬麵IOL組比較.結果 5 mm瞳孔直徑下非毬麵IOL組MTF截止空間頻率和斯特爾率比毬麵IOL組有所增加,其中非毬麵IOLII組(0.05 μm≤SA＜0.15 μm)比Ⅰ、Ⅲ組均有輕度的增加,然而毬麵IOL組焦深最大.SR隨毬差的增加而減小,焦深與全眼毬差成正相關.結論 白內障術後餘留一定全眼毬差(約+0.08 μm)可以改善視覺質量,同時有較好的矯正遠距離的近距離視力及閱讀能力.最終全眼毬差在0.07～0.1 μm時可以穫得較好的視網膜成像質量及較高的離焦耐受性.
목적 탐토백내장연합인공정상체(IOL)식입술후전안구차대초심급객관시각질량적영향.방법 회고성병례연구.수집2011년9월지2012년3월재천진시안과의원취진적년령상관백내장연합인공정상체식입술후3개월환자80례(140지안).비구면IOL안110지안,구면IOL안30지안.대5 mm동공하비구면IOL전안구차진행분삼조,Ⅰ조(-0.1 μm≤SA＜0.05 μm) 32지안,Ⅱ조(0.05μm≤SA＜0.15 μm) 38지안,Ⅲ조(0.15 μm≤SA＜0.4 μm)40지안,용i-Trace파전상차의측량전안상차급각막상차진행상차분석.사용VOL-CT연건,+2.00～-2.00 D,경과초점분석회제사특이비솔(Ste-rol Ratio,SR)곡선,대비불동구차조적리초.거제산광후,근거리초계산사특이비솔,동시종해연건가이획득조제전체함수(modulation transfer function,MTF)절지공간빈솔.SR화MTF절지공간빈솔작위평개광학질량적표준.아문소측적초심(depth of focus,DOF)치시안대우등우SR최대치80％적리초범위계산.분석비구면IOL불동전안구차조대초심급시각질량적영향병동구면IOL조비교.결과 5 mm동공직경하비구면IOL조MTF절지공간빈솔화사특이솔비구면IOL조유소증가,기중비구면IOLII조(0.05 μm≤SA＜0.15 μm)비Ⅰ、Ⅲ조균유경도적증가,연이구면IOL조초심최대.SR수구차적증가이감소,초심여전안구차성정상관.결론 백내장술후여류일정전안구차(약+0.08 μm)가이개선시각질량,동시유교호적교정원거리적근거리시력급열독능력.최종전안구차재0.07～0.1 μm시가이획득교호적시망막성상질량급교고적리초내수성.
Objective To investigate the level of residual spherical aberration that shows the best objective quality of image and depth of focus (DOF) of eyes after cataract surgery with aspheric intraocular lens and spherical intraocular lens implantation.Methods The clinical data from 140 eyes (80 patients) of 3-month follow-up after cataract surgery with IOL implantation were retrospectively studied,including 98 eyes with aspheric IOL implantation and 28 eyes with spherical IOL implantation.Corneal,entire and internal aberrations including total higher-order aberration,3rd-order and 4th-order aberration were computed using i-Trace visual function analyzer.Base on entire spherical aberration (SA) value,aspheric IOL were assigned to three groups:group Ⅰ (32 eyes)-0.1μm≤SA＜0.05μm,group Ⅱ (38 eyes) 0.05μm≤SA＜0.15μm,group Ⅲ (40 eyes) 0.15um≤SA＜0.4μm.Strel ratio (SR),modulation transfer function (MTF) curves were measured with Visual Optics Lab-CT software,DOF and MTF cut-off frequency was obtained at 5mm pupil diameter.Objective depth of focus was computed as the focus range at which the Sterol ratio didn't fall below 80％ of maximum.These values were analyzed and compared with spherical IOL group.Results The MTF cut-off frequency value and SR was slightly increased with implantation of the SA0.05μm≤SA＜0.15 μm aspheric IOL under the pupil diameter of 5mm.DOF of spherical IOL were larger than aspheric IOL.The MTF cutoff values were higher with decreasing total ocular spherical aberration (r =-0.373; P ＜0.05),DOF had positive correlation with entire spherical aberration (r =0.365; P ＜0.05).Conclusions A final spherical aberration of about 0.08um obtained by compensation of IOL asphericity give the greatest improvement in objective quality of vision and better distance-corrected near visual acuity.However,a final target entire spherical aberration between 0.07 mm and 0.10 mm shall be considered to be achieved best image quality with the higher tolerance to defocus.
