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TORIC IOLSNawat Watanachai
2015
CHOICES TO TREAT ASTIGMATISM ALONG WITH CATARACT SX➤ (glasses)➤ corneal Sx
➤ LRI➤ manual➤ femtosecond
➤ astigmatic keratotomy➤ Toric IOLs
CHOICES TO TREAT ASTIGMATISM ALONG WITH CATARACT SX➤ (glasses)➤ corneal Sx
➤ LRI➤ astigmatic keratotomy
➤ Toric IOLs➤ cylinder on 1 surface➤ spherical on the other surface
➤ ONLY for regular astigmatism➤ correct corneal astigmatism
WHY TORIC?➤ because it is one of the
best way to treat astigmatism
CANDIDATE FOR TORIC➤ minimum 1.25D cylinder➤ regular astigmatism
TORIC IOL IS NOT INDICATED IN➤ cylinder <1.25D➤ pts willing only for SICS,
ECCE➤ traumatic cataract➤ irregular astigmatism
➤ corneal scar/ pterygium➤ combined Sx
➤ corneal/ glaucoma/ retina
➤ squint
WHY TORIC?
manual LRI femto LRI toric IOL
accuracy less/ tend to undercorrect/ regressed equal? equal?
reversible no no yes
weaken cornea yes/ perforation yes no
price low high fair
TORIC IOLS➤ STAAR IOL➤ Acrysof toric(Alcon)➤ Tecnis toric (AMO)➤ Crystalens Trulign (B&L)
TORIC IOLS➤ STAAR IOL
➤ 1-piece plate-type➤ may not fit to all capsular bag
➤ 10.8 and 11.2 mm width➤ silicone
➤ less reflectivity➤ anterior capsule fibrosis
➤ Acrysof toric(Alcon)➤ Tecnis toric (AMO)➤ Crystalens Trulign (B&L)
IOL power
acrysof toric single pieceaspheric hydrophobic yellow +6 to + 30
tecnis toric single piece hydrophobic clear
corrective power at corneal
plane (D)
acrysof toric 0.75-4.0 higher RI1.55
higher reflectivity
tecnis toric 1, 1.5, 2, 2.75
harden surface (less
scratch)lower RI lower reflectivity
light filtration
acrysof toricfull 6mm refractive
opticmore sticky
haptic UV, blue
tecnis toric less sticky haptic
more -ve spheric aberration,
less chromatic aberration
CYLINDER POWER OPTIONS : ACRYSOF
ALCON® LENS MODEL SN6AT2 SN6AT3 SN6AT4 SN6AT5 SN6AT6 SN6AT7 SN6AT8 SN6AT9
IOL Plane 1.00 D 1.50 D 2.25 D 3.00 D 3.75 D 4.50 D 5.25 D 6.00 D
Corneal Plane* .68 D 1.03 D 1.55 D 2.06 D 2.57 D 3.08 D 3.60 D 4.11 D
Recommended Corneal Astigmatism Correction
Range .50 D to .90 D .90 D to 1.50 D 1.50 D to 2.00 D 2.00 D to 2.50 D 2.50 D to 3.00 D 3.00 D to 3.50 D 3.50 D to 4.00 D 4.00 D and up
TORIC IOLS➤ STAAR IOL➤ Acrysof toric(Alcon)➤ Tecnis toric (AMO)➤ Crystalens Trulign (B&L)
➤ 3-piece?➤ good stability, less rotation
MAKING THE MOST OF TORIC➤ give this option to all the pts c signif. astigmatism➤ look for any obstacles
➤ irregular astigmatism➤ corneal scar/ pterygium/ old IK/ corectopia etc.
➤ multi-measures➤ IOL master + corneal topo➤ IOL master + automated keratometryhyyokkll;.➤ IOL master X2
➤ special consideration needs in eyes after refractive Sx eg. LASIK
Input Screen
Patient informationDoctor namePatient name or ID numberOperative eye
Keratometry & Biometry dataFlat K reading (in diopters)Flat meridian (in degrees)Steep K reading (in diopters)Steep meridian (in degrees) IOL spherical power as determined by the
surgeon’s preferred formula with conventional monofocal IOLs
Surgeon-dependent inputEstimated surgically induced cylinder Incision location (0 to 360°)
MAKING THE MOST OF TORIC➤ procedures
➤ make reference marking (in UPRIGHT position)➤ manually mark 0’, (90’), 180’➤ automatically mark with the machine➤ note : 1’IOL rotation —> loss of 3.3% of IOL
cylinder power➤ CCC➤ intact capsular bag
SURGICAL TIPS➤ on-axis placement
➤ gross alignment : 20-30’ short➤ OVD removal➤ final alignment
SURGICAL TIPS
➤ single piece IOL➤ remove visco behind the lens to prevent rotation
➤ average SIA is 0.25-0.5D for 2.8mm incision➤ incision location can varied (temporal/ superior) to
achieve the least residual astigmatism
CALCULATORS FOR TORIC IOL➤ websites
➤ www.aurolab/optical.com➤ www.toriccalculator.com➤ www.doctor-hill.com➤ www.acrysoftoriccalculator.com
➤ apps➤ toricIOL