欢迎来到天天文库
浏览记录
ID:25164963
大小:3.95 MB
页数:52页
时间:2018-11-15
《iol 人工晶体计算公式》由会员上传分享,免费在线阅读,更多相关内容在教育资源-天天文库。
1、IOL人工晶体计算公式天津迈达医学科技有限公司MEDACO.,LTDAL--眼轴长度(AxialLength)(15mm<=AL<=40mm)K--平均的角膜曲率=(K1+K2)/2AveragedioptricpowerofcorneaR--曲率半径(mm)CorneacurvatureinmmACD–(术后)前方深度,常数(0.5mm2、picpower)Dam–在术后希望预留的屈光度数时,需植入人工晶体的度数Refr–目标屈光度数(TargetRefraction)IOL–需植入的人工晶体度数一参数变量(Variables)SRK-IISRK-TBINKHORSTIIHOLLADAYHOFFER-QHAIGIS人工晶体计算公式(IOLFormular)Dem=A–2.5*AL–0.9*K+CC(Correction)=3(ifAL<20mm)=2(if20<=AL<21mm)=1(if21<=AL<22mm)=0(if22<=AL<24.5mm)=-0.5(ifAL>=24.5)----------------3、---------------------------------------------------------------------IOL=Dem–(Refr*Rf);Dam=Dem–(Dr*Rf);Refr=(Dem-IOL)/Rf;其中Rf=1.25(ifDem>14)=1.00(ifDem<=14)SRK-IIFormularSRK-TFormularLc=AL;(AL<=24.2)-3.446+(1.716*AL)–(0.0237*AL*AL);(AL>24.2)Rmm=337.5/K;C1=-5.40948+0.58412*Lc+0.098*K;Rc=[Rmm*R4、mm-C1*C1/4];IfRc<0thenRc=0;C2=Rmm–SQRT[Rc];ACD=0.62467*A–68.74709;ACDe=C2+ACD-3.3357;L0=0.97971*AL+0.65696;S1=L0–ACDe;S2=1.336*K–0.3333*ACDe;S3=1.336*K–0.3333*L0;S4=12*S3+L0*K;S5=12*S2+ACDe*K;Refr=(1336*S3–IOL*S1*S2)(1.336*S4–0.001*IOL*S1*S5)IOL=(1336*(S3–0.001*Refr*S4))(S1*(S2-0.001*Refr*S5)5、)Dem=1000*S3/(S1*S2);Dam=(1336*(S3–0.001*Dr*S4))(S1*(S2-0.001*Dr*S5))SRK-TFormular(2)Lc=0.97971*AL+0.65696;R=337.5/K;Lcor=AL;if(My_AL<=24.2)-3.446+1.716*AL-0.0237*AL*AL;if(My_AL>24.2)Crwdest=-5.40984+0.58412*Lcor+0.098*K;ACDt=0.62467*A-68.74709;x=R*R-Crwdest*Crwdest/4;if(x<0)x=0;Hest=R-sqrt(x6、);ACDx=Hest+ACDt-3.3357;IOL=Get_IOL_T(ACDx,Lc,R,Refr);Dem=Get_IOL_T(ACDx,Lc,R,0);Dam=Get_IOL_T(ACDx,Lc,R,Dr);Refr=Get_Refr_t(ACDx,Lc,R,IOL);Binkhorst-IIFormularLb=AL+0.1984ACDb=ACD*(AL/23.45);(ifLb<26)1.1087*ACD;(ifLb>=26)ACDx=ACD(AnteriorChamberIOLs);ACDb(PosteriorChambleIOLs);R=337.5/K;IOL=7、Get_IOL_T(ACDx,Lb,R,Refr);Dem=Get_IOL_T(ACDx,Lb,R,0);Dam=Get_IOL_T(ACDx,Lb,R,Dr);Refr=Get_Refr_t(ACDx,Lb,R,IOL);HolladayFormularLc=AL+0.200;R=337.5/K;SF=0.5663*A-65.60;Rag=R;if(R>=7.0)7.0if(R<7.0)AGx=12.5/23.45*AL;if(AGx>13.5)AGx=13.5;ACDh=0.
2、picpower)Dam–在术后希望预留的屈光度数时,需植入人工晶体的度数Refr–目标屈光度数(TargetRefraction)IOL–需植入的人工晶体度数一参数变量(Variables)SRK-IISRK-TBINKHORSTIIHOLLADAYHOFFER-QHAIGIS人工晶体计算公式(IOLFormular)Dem=A–2.5*AL–0.9*K+CC(Correction)=3(ifAL<20mm)=2(if20<=AL<21mm)=1(if21<=AL<22mm)=0(if22<=AL<24.5mm)=-0.5(ifAL>=24.5)----------------
3、---------------------------------------------------------------------IOL=Dem–(Refr*Rf);Dam=Dem–(Dr*Rf);Refr=(Dem-IOL)/Rf;其中Rf=1.25(ifDem>14)=1.00(ifDem<=14)SRK-IIFormularSRK-TFormularLc=AL;(AL<=24.2)-3.446+(1.716*AL)–(0.0237*AL*AL);(AL>24.2)Rmm=337.5/K;C1=-5.40948+0.58412*Lc+0.098*K;Rc=[Rmm*R
4、mm-C1*C1/4];IfRc<0thenRc=0;C2=Rmm–SQRT[Rc];ACD=0.62467*A–68.74709;ACDe=C2+ACD-3.3357;L0=0.97971*AL+0.65696;S1=L0–ACDe;S2=1.336*K–0.3333*ACDe;S3=1.336*K–0.3333*L0;S4=12*S3+L0*K;S5=12*S2+ACDe*K;Refr=(1336*S3–IOL*S1*S2)(1.336*S4–0.001*IOL*S1*S5)IOL=(1336*(S3–0.001*Refr*S4))(S1*(S2-0.001*Refr*S5)
5、)Dem=1000*S3/(S1*S2);Dam=(1336*(S3–0.001*Dr*S4))(S1*(S2-0.001*Dr*S5))SRK-TFormular(2)Lc=0.97971*AL+0.65696;R=337.5/K;Lcor=AL;if(My_AL<=24.2)-3.446+1.716*AL-0.0237*AL*AL;if(My_AL>24.2)Crwdest=-5.40984+0.58412*Lcor+0.098*K;ACDt=0.62467*A-68.74709;x=R*R-Crwdest*Crwdest/4;if(x<0)x=0;Hest=R-sqrt(x
6、);ACDx=Hest+ACDt-3.3357;IOL=Get_IOL_T(ACDx,Lc,R,Refr);Dem=Get_IOL_T(ACDx,Lc,R,0);Dam=Get_IOL_T(ACDx,Lc,R,Dr);Refr=Get_Refr_t(ACDx,Lc,R,IOL);Binkhorst-IIFormularLb=AL+0.1984ACDb=ACD*(AL/23.45);(ifLb<26)1.1087*ACD;(ifLb>=26)ACDx=ACD(AnteriorChamberIOLs);ACDb(PosteriorChambleIOLs);R=337.5/K;IOL=
7、Get_IOL_T(ACDx,Lb,R,Refr);Dem=Get_IOL_T(ACDx,Lb,R,0);Dam=Get_IOL_T(ACDx,Lb,R,Dr);Refr=Get_Refr_t(ACDx,Lb,R,IOL);HolladayFormularLc=AL+0.200;R=337.5/K;SF=0.5663*A-65.60;Rag=R;if(R>=7.0)7.0if(R<7.0)AGx=12.5/23.45*AL;if(AGx>13.5)AGx=13.5;ACDh=0.
此文档下载收益归作者所有