1 Uday Devgan MD Los Angeles You can download my slides for free at
2 Abbott Medical Optics: consultant, research Accutome Inc: speaker Alcon Laboratories: stockholder Allergan: consultant, speaker, research funding Bausch & Lomb: consultant, research funding Gerson Lehman Group: consultant Haag-Streit: speaker Hoya Surgical Optics: consultant, speaker Inspire Pharma: stockholder (former), consultant Ista Pharma: consultant, speaker, stockholder iTherapeutix: research funding, travel support Optos Inc: speaker Renaissance Surgical: stockholder Sirion Therapeutics: consultant Specialty Surgical: stockholder Staar Surgical: consultant (former) Zeiss / Carl Zeiss Meditec: speaker This presentation represents the speaker’s professional experience. Uday Devgan MD disclosures
3 Astigmatism Must Be Addressed
4 How close do I have to be for excellent visual results with the Crystalens? 1.plano +/ D< 0.50 D cyl 2.plano +/ D< 1.00 D cyl 3.my patients have such dense cataracts they are happy even if I leave them aphakic. Question #1
5 Confirmed with SurgiVision Data
6 Binocular: 20/20 dist, 20/18 int, 20/25 near if there is minimal cylinder
7 Perfect Plano Quick, where’s my camera?
8 1D Residual Astigmatism (Far)
9 1D Residual Astigmatism (Near)
10 Nailing +/ D for Both Sphere and Cylinder Is Important
11 Sphere
12 Effective Lens Position is Critical The A-constant assumes a proper posterior vault of the Crystalens
13 Incisions Must be 100% Sealed
14 Cylinder
15 The Difference Between Sad & Happy – 2.00 x 090 SE = Plano – 0.50 x 090 SE = Plano
cyl-0.50 cyl Crystalens HD Crystalens AO Is the AO More Forgiving than the HD?
17 Measure & Treat the Astigmatism
18 How do you determine the amount of pre-op astigmatism that needs to be fixed? 1.IOL Master / Lenstar 2.corneal topography 3.manual keratometry 4.manifest refraction Question #2
19 Pre-Op Corneal Cylinder Ignore the refraction cylinder Look at the Corneal cylinder
20 Topography to Check Symmetry
21 Weed-out Inappropriate Patients
22 Address the Astigmatism Topography Effect of your incisions? LRI: Limbal Relaxing Incisions
23 What’s the effect of your incision? Most clear K incisions = Flattening of about 0.50 D Pre-op K: x x 120
24 LRIs can reduce/eliminate K cyl BEFORE AFTER Thank you to Kevin Miller MD for this slide.
25 Factor in your Phaco Incision: Figure 1 © 2009 Uday Devgan MD
26 BEFORE SURGERY x x 180 © 2009 Uday Devgan MD
27 AFTER PHACO INCISION (0.5 D of flattening at 180) x x 180 © 2009 Uday Devgan MD
28 WITH LRI DONE FOR 1 DIOPTER AT x x 180 © 2009 Uday Devgan MD
29 LRIs are placed in the peripheral clear cornea by tracing along the fixation ring. © 2009 Uday Devgan MD
30 Post-Op Astigmatism
31 What are the causes of post-op astigmatism? 1.irregular ocular surface 2.residual corneal astigmatism 3.IOL tilt or shift from capsular bag contraction / fibrosis 4.all of the above Question #3
32 Irregular Corneas (uncommon)
33 Residual Refraction (common) Not Enough Effect From Your LRI
34 Capsule Issues Causing IOL Shift
35 Small Rhexis / Phimosis Hyperopic Shift and Induced Cylinder
36 Posterior Capsule Fibrotic Bands Myopic Shift and Induced Cylinder
37 After YAG of Capsular Striae
38 Poor Rhexis = Poor Result All 4 footplates must be at the capsular bag equator One arm in the sulcus will cause IOL tilt
39 If you remember just ONE thing…
40 NAIL PLANO Sphere & Cylinder within 0.50 D of plano