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Biometry
Healthy Eye
IOL Calculation
s
IOL Technology
Visual Goals
Enhancement
Reproducibility
Safety
Femto
Aberrometry
IOL Positioning
Biometry
Healthy Eye
IOL Calculation
s
IOL Technology
Visual Goals
Enhancement
Reproducibility
Safety
Femto
Aberrometry
IOL Positioning
Biometry
Healthy Eye
IOL Calculation
s
IOL Technology
Visual Goals
Enhancement
Reproducibility
Safety
Femto
Aberrometry
IOL Positioning
Intraoperative IOL Positioning
Initial IOL Position Final IOL Position
Initial IOL Position Final IOL Position Image Courtest Daniel Chang MD
How Does Femto Help?
• Decreased Ultrasound Energy (30%) • Reproducibility
– Rhexis – Incisions – Astigmatic Keratotomies – Effective Lens Position? – Refractive Outcomes?
Adapted from: Femtosecond Laser-assisted Cataract Surgery Michael Lawless, Chandra Bala US Ophthalmic Review, 2014;7(2):82-88
✓
✓
✓
R² = 0.709
4.00
4.25
4.50
4.75
5.00
4.20 4.60 5.00 5.40 5.80 6.20
Actual ELP 1M PostOP
Predicted ELPo
LenSx Group (n=22)
95% Confidence Intervals
R² = 0.2877
4.00
4.25
4.50
4.75
5.00
4.20 4.60 5.00 5.40 5.80 6.20
Actual ELP 1M PostOP
Predicted ELPo
Manual Group (n=26)
71% of the variable’s variance result for the LenSx group Vs. only 29% for the manual group.
Better ELP predictability
• SN60WF Only
•Prospective, Non-Randomized, Multi-Site Study •Single Lens Type (Acrysof Platform- SN60WF) •83 Eyes (Laser Capsulotomy = 39 Manual Capsulotomy = 44)
•Kerry Solomon, M.D., Robert Cionni, M.D. •1 Month Postop: Accuracy to Target & Visual Acuity
51%
64%
95%
5%
32%
43%
80%
20%
0%
20%
40%
60%
80%
100%
20/20 or Better 20/25 or Better 20/40 or Better 20/50 or Worse
1M UCVA
LenSx (n=39)
Manual (n=44)
59% more
49% more
19% more
75% Less
Large ESCRS Study
Showed no difference between Phaco & Femto
However
Recent ISRS paper argues otherwise
Abell et. al Jan 2015 JSCRS
• >4000 Cases • Statistically More anterior tears in Laser Group
(1.84% vs 0.22%) • Low Posterior Tear rate in both groups
T-LACS Therapuetic Laser-Assisted Cataract
Surgery • 24 eyes with complex cataracts including
capsular scars, phacodonesis, and white cataracts.
• 4 patients had posterior capsule tears during • 79% of patients achieved a BCVA of 20/40 or
better.
Is T-LACS helpful Manual Pre LenSx® Laser SoftFit™ Patient Interface
Catalys* Victus 2* Victus 1*
Post LenSx® Laser SoftFit™ Patient Interface
*Trademarks are properties of their respective owners
Biometry
Healthy Eye
IOL Calculation
s
IOL Technology
Visual Goals
Enhancement
Reproducibility
Safety
Femto
Aberrometry
IOL Positioning
Audience Response Question
IF I had 2D of Astigmatism and Cataracts I would want: A) Toric IOL B) Toric Accomodating IOL C) Toric Multifocal IOL D) Multifocal or Accommodating with LASIK E) Standard IOL and Glasses
ASTIGMATISM AND CATARACT SURGERY
1. Market Scope, Data as of 2013. Comprehensive Report on Global IOL Market.
More than
of the population has >1 D of astigmatism
1/3 INCIDENCE OF ASTIGMATISM IN THE U.S. POPULATION1
Causes of Residual Astigmatism
Wrong Location Poor Measurements Poor Calculations Surprising SIA Posterior Ks IOL Rotated Poor IOL Placement
Wrong Lens Poor Measurements Poor Calculations Surprising SIA Posterior Ks
Wrong Eye Ocular Surface Disease ABMD Irregular Astigmatism
Treat Disease
Causes of residual refractive astigmatism
Ideal Axis of IOL (determined by astigmatismfix.com)
Intended Axis of IOL (from calculations) Actual Axis of IOL
(measured)
Rotation: difference from intended
www.astigmatismfix.com
Prior MRX -1.00 + 1.75 x 150 Predicted MRX -0.29 + 0.32 x 150 Final Refraction -0.25 +0.25 x 155
Rotate IOL 10° CCW
Actual Axis of Toric IOL
Ideal Axis of Toric IOL
How Intended Axis = Ideal Axis? Pre-operative
• K’s – Manual – Biometry – Topography
Intraoperative • Alignment Systems
– Pre-op Images linked to Microscope Display
• Callisto, Verion, • TrueVision, Streamline
• Aberrometry – ORA – Holos
When to Trust Aberrometry
Routine Cases
Literature** ORA wVerifEye
ATIOLs
60%
84% 86%
% o
f Pat
ient
s with
in .5
0D
N=3380 N=1329 N=683 **Anders Behndig, M.D., Ph.D., et al, Swedish National Cataract Registry. J Cataract Refract Surg. (July) 2012
When to Trust Aberrometry
Post-Refractive
0.44 0.7 0.66 0.6
Aberrometry Surgeon BestChoice
Haigis L Shammas
Mean Absolute Error
1. Ianchulev T, Hoffer KJ, Yoo SH, et al. Intraoperative refractive biometry for predicting intraocular lens power calculation after prior myopic refractive surgery. Ophthalmology 2014;121:56–60.
Why to Trust Aberrometry
Astigmatism Its better to measure than estimate ~15% of patients don’t have ATR on the posterior cornea
1. Koch DD, Ali SF, Weikert MP, et al. Contribution of posterior corneal astigmatism to total corneal astigmatism. J Cataract Refract Surg 2012;38:2080–2087.
When to Trust Aberrometry
Astigmatism
10.8%
23.4%
0.0%
5.0%
10.0%
15.0%
20.0%
25.0%
With ORA Convetional Approach
More than 0.5D of Residual Astigmatism
When to Question Aberrometry
Post-RK High Hyperopia Highly Irregular Corneas Pseudophakic Readings (Sphere and Cylinder) * Or if you enter incorrect biometric data
Audience Response Question
What would you suggest? A) Monfocal Distance B) Monovision C) Multifocal D) Accomodating
Wants Spectacle Independence 64 YO F 20/25 OU BAT 20/40 Prior PRK 6 years ago
Audience Response Question
What would you suggest? A) Monfocal Distance B) Monovision C) Multifocal D) Accomodating
Wants Spectacle Independence 64 YO F 20/25 OU BAT 20/40 Prior PRK 6 years ago
Restor 4.0, 3.0, 2.5 +Toric
Eye Characteristics – Astigmatism <0.75D – Pristine macula – Treat Dryness Pre-op – Low HOA’s – Similar 3 and 5mm MRX – Angle Kappa < 0.4mm
Goal – Desires all focal points – Mild compromise of quality – OK needing good light – OK with possible halos
Tecnis Multifocal +4.0, +3.25, +2.75 +1.75 (Symfony) + Toric
Eye Characteristics – Astigmatism <0.75D – Pristine macula – Treat Dryness Pre-op – Low HOA’s – Similar 3 and 5mm MRX – Angle Kappa < 0.5mm – High Myopes, Young
Goal – Desires distance and near – OK with possible halos
Patient Characteristics – Desires distance and
intermediate (or near with Mini-Mono)
– No Halos – Readers for fine print
Eye Characteristics – Astigmatism <1.0D – Treat Dryness Pre-op – Stable Zonules
Crystalens & Trulingn
Biometry
Healthy Eye
IOL Calculation
s
IOL Technology
Visual Goals
Enhancement
Reproducibility
Safety
Femto
Aberrometry
IOL Positioning
Max Planck
“a new scientific truth does not triumph by convincing its opponents and making them see the light, but rather because its opponents eventually die and a new generation grows up that is familiar with it.”
68 yo Patient, with Cat and Mild POAG on 1 med:
A) Cataract Surgery Alone B) Cataract plus iStent C) Cataract plus ECP D) Cataract plus other glaucoma procedure
What is MIGS? • Ab-interno Microincision • Minimal Trauma • Efficacy • Safety • Rapid Recovery
, H., & Ahmed, I. I. K. (2012). Micro-invasive glaucoma surgery: current perspectives and future directions. Current opinion in ophthalmology, 23(2), 96–104. doi:10.1097/ICU.0b013e32834ff1e7
TVT
Tube Trab
IOP 14.4 12.6
# of Meds 1.4 1.2
Failure Rate 30% 47%
Complications Post-op
39% 60%
Complications Surgical
22% 27%
Reoperation 9% 29%
5 year data
Gedde, S. J., Schiffman, J. C., Feuer, W. J., Herndon, L. W., Brandt, J. D., Budenz, D. L., Tube versus Trabeculectomy Study Group. (2012). Treatment outcomes in the Tube Versus Trabeculectomy (TVT) study after five years of follow-up. American journal of ophthalmology, 153(5), 789–803.e2. doi:10.1016/j.ajo.2011.10.026
MIGS Device Company Site Availablility Approval
iStent Glaukos Trabecular Meshwork Yes PMA
KDB New World Medical
Trabecular Meshwork Yes Class 1
Aquesys Aquesys Sub-Conjuntival Trials 510K
Hydrus Ivantis Trabecular Meshwork Trials PMA
Cypass Alcon SupraChoroidal Trials PMA
iStent inject Glaukos Trabecular Meshwork Trials PMA
IStent supra Glaukos SupraChoroidal Trials PMA
IOPMeds
18.7
2.8
13.4
0.5
Preop Postop
Multiple iStents vs Phaco Alone Avg 2.7 stents
Belovay GW, Ahmed IK. Using multiple trabecular micro bypass stents in cataract patients to treat primary open-angle glaucoma. Paper Presentation ASCRS Symposium on Cataract, IOL and Refractive Surgery Boston MA; 2010.
Fernandez-Barrientos Y, Garcia-Feijoo J, Martinez-de-la-Casa JM, et al. & Fluorophotometric study of the effect of the glaukos trabecular microbypass stent on aqueous humor dynamics. Investig Ophthalmol Visual Sci 2010
275% increase in Facility of Outflow