Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 - 16 Pages

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Catalogue excerpts

Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 HAAG-STREIT DIAGNOSTICS

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 2 SUPPLEMENT TO CATARACT & REFRACTIVE SURGERY TODAY/EUROPE OCTOBER 2014

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 Contents Lenstar and the T-Cone Toric Platform . . . . . . . . . . . . . . . . . . . . . . 4 Offering sophisticated planning for toric IOL implantation and improved refractive outcomes. BY WARREN E. HILL, MD A Formula for All Seasons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6 The Barrett Universal II and True K formulas and the Barrett Toric Calculator provide the best results for toric, postrefractive, and standard cataract patients. BY GRAHAM D. BARRETT, MD, FRACO Hitting Your Target...

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 Lenstar and the T-Cone Toric Platform Offering sophisticated planning for toric IOL implantation and improved refractive outcomes. BY WARREN E. HILL, MD ntil recently, a logical, validating approach to planning for toric IOL implantation was lacking, and surgeons typically relied on a series of keratometry (K) readings taken preoperatively to provide an acceptable postoperative outcome for both the sphere and cylinder values of a toric IOL. What was missing, however, was an additional and crucial step to measuring...

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Figure 2 . Example of how an anterior corneal axial power map with the Lenstar LS 900 can be used to determine the steep (black dotted line) and flat (red dotted line) meridians within the central 3 .5-mm zone (shaded area) . The steep meridian is calculated by drawing a line through the corneal vertex and the center of each of the two astigmatic lobes; this is read from the peripheral axis scale . Platform should first be used to confirm that the anterior corneal astigmatism is both regular and symmetrical. The steep meridian is then manually determined, paying close attention to the central...

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 A Formula for All Seasons The Barrett Universal II and True K formulas and the Barrett Toric Calculator provide the best results for toric, postrefractive, and standard cataract patients. BY GRAHAM D. BARRETT, MD, FRACO chieving predictable outcomes after cataract surgery has become increasingly important. Many formulas, both regression and theoretical, perform reasonably well in average eyes but are less predictable in eyes with short or long axial lengths (ALs). In the late 1980s, I conceived the Universal formula,...

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Comparison True K vs ASCRS Website 46 Patients Post Lasik ■ ASCRS Website °'*1- —- , • True-K Formula Toric IOL Study Centroid 54 eyes r s'-    Holladay Calculator    MjT True K (Universal) MAE = 0.56 D ASCRS Website MAE = 0.86 D Figure 3 . Comparison of the True K formula and the formulas used with the ASCRS toric IOL calculator, the correct IOL for patients who have previously undergone LASIK or radial keratotomy (RK) is challenging, as traditional ketratometry may no longer represent the effective corneal power; rather, it has the tendency to overestimate the true K value. Instruments such...

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 The Barrett Universal II and True K formulas and the Barrett Toric Calculator are solutions for predicting IOL power in eyes with different ALs, those that have previously undergone refractive surgery, and those with astigmatism requiring toric IOLs. Lenstar, IOLMaster (Carl Zeiss Meditec), or Pentacam (Oculus) to measure the posterior cornea.3 After the pupil was dilated, the axis of alignment was determined at the slit lamp. We compared the percentage of cases within ±0.50 D of intended correction and the centroid...

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Hitting Your Target With Toric lOLs The Barrett Toric Calculator can be used to calculate the cylinder power and axis of a toric IOL. BY ADI ABULAFIA, MD The correction of corneal astigmatism with toric lOLs has become a standard of care and a means to improve refractive outcomes after cataract surgery. However, the results are not always predictable. During my work as the medical director of the IOL calculation unit at Ein-Tal Eye Center in Tel-Aviv, Israel, I learned that even correcting for rotational misalignment of the IOL and unexpected surgically induced astigmatism (SIA) did not always...

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Barrett Toric calculator: Standard Toric calculator: Figure 2 . Double-angle plots of errors in predicted residual astigmatism using the Lenstar with the Barrett Toric Calculator (left) and a standard toric IOL calculator (right) . corneal astigmatism measurements taken 1 week apart with the Lenstar (Haag-Streit) and the lOLMaster (Carl Zeiss Meditec). The Lenstar showed better reproducibility compared with the IOLMaster; the absolute cylinder power difference was 0.50 D or less in 100% and 82.9% of eyes with the Lenstar and IOLMaster, respectively (Figure 1). These results can be attributed to...

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 lOLMaster + Barrett Toric Calculator: Pentacam + commercial Toric calculator Figure 3 . Double-angle plots of errors in predicted residual astigmatism using the lOLMaster with the Barrett Toric Calculator (left) and the Pentacam with a commercial toric IOL calculator (right) . we evaluated a cohort of 68 eyes and examined the two factors that we thought could contribute to unexpected outcomes with toric IOLs: (1) the method of measuring corneal astigmatism and (2) the method of predicting the required power and...

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Master Your Toric Planning and Improve Refractive Outcomes With the LENSTAR LS 900 Patient-Specific Factors in IOL Power Calculations The additional data included in the Holladay 2 and Olsen formulas can positively affect clinical outcomes. BY RICK POTVIN, OD; WARREN E. HILL, MD; AND EDWARD MEIER, MD here is no question that advances in both cataract surgery technique and IOL power calculation formulas have significantly improved outcomes in patients undergoing cataract surgery.1 One of the largest and most current databases collected to date regarding the overall outcomes of cataract surgery...

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