Reanalysis of Refractive Growth in Pediatric Aphakia and Pseudophakia Susan Whitmer, MD 1 Aurora Xu 2 Scott McClatchey, MD 1,3,4 1 Naval Medical Center.

Slides:

Advertisements

Similar presentations

IN THE NAME OF GOD.

Advertisements

Comparison of intraocular lens power calculation formulas with LENSTAR LS 900® Tsunekazu Hamada Hamada Eye Clinic, Osaka, Japan Disclosure statement of.

Comparison of Visual Outcomes With Toric IOL and With Limbal Relaxing Incisions in Cataract Surgery Eriko Fukuyama, MD Fukuyama Eye Clinic Fukuoka, Japan.

Writing Committee for the Cornea Donor Study Research Group

Accuracy of Predicted Refractive Error in Resident-Performed Cataract Surgery Using Partial Coherence Interferometry Nickolas P. Katsoulakis, M.D., Paul.

Eugene Ng, Arthur B. Cummings, Patrick P. Collins, Alexander V. Goncharov, Diana Bogusevschi, Chris Dainty, Michael C. Mrochen. The authors of this paper.

Optics 1----by Dr.H.Huang, Department of Applied Physics

Development of an Apple iPhone IOL Calculator Application for Cataract Surgery Rony Gelman, MD 1, Richard E. Braunstein, MD 1 1 Department of Ophthalmology,

Visual outcome & subjective visual symptoms of the Tecnis ZM900 multifocal intraocular lens in Asian eyes Dr Colin S.H. Tan MBBS, MMed (Ophth), FRCSEd.

Anupama Kotha 1, Simar J. Singh 1, William B. Trattler 1,2, Carlos Buznego 1,2 The authors have no financial interest in the subject matter of this poster.

Disclosure of finanacial interest * Author has no financial interest in this paper. ** Author's research is partially funded by Imperial Medical Technologies.

Progressive Multifocal Intraocular Lens G. Rubiolini M.D. Italy Disclosure of finanacial interest Author's research is partially funded.

Walter Huang, OD Yuanpei University Department of Optometry

IOL power calculation after refractive surgery A. Peyman, MD.

Anterior Chamber Depth, Iridocorneal Angle Width, and Intraocular Pressure Changes After Phacoemulsification: Narrow vs Open Iridocorneal Angles Huang.

Vision-Related Quality of Life Assessment using NEI-VFQ-25 in Children With History of Phakic or Aphakic IOL Refractive Surgery. Claire Hartnett MD Michael.

REFRACTIVE ASPECTS OF CATARACT SURGERY. OPTICAL CORRECTIONS AFTER CATARACT EXTRACTION.

Placement of Toric Intraocular Lens and the Long-term Change in the Axis of Corneal Astigmatism after Sutureless Cataract Extraction by Phacoemulsification.

Bilateral phacoemulsification and intraocular lens (IOL) implantation for bilateral corneal ectasia after photorefractive keratectomy (PRK) Department.

Richard Y. Hwang 1, PhD; Dan Gauthier 2, PhD; Dana Wallace 1, MD; Natalie A. Afshari 1, MD 1 Department of Ophthalmology, 2 Department of Physics Duke.

G. Jacob 1,2, C. Bouchard 2, S. Kancherla 1. Edward Hines, Jr. VA Hospital, Hines, IL, Department of Ophthalmology 1. Loyola University Medical Center,

PIGGYBACK IMPLANTATION OF FOR HIGH HYPEROPIA 24 MONTHS FOLLOW UP JL. FEBBRARO I.VIELPEAU, F. KRIFA, S.BERBACHE, S. GANEM Department of Ophthalmology S.

Jump to first page Pediatric Clear Lensectomy for High Myopia Mounir Bashour, M.D., C.M.

Evaluation of Corneal Parameters and Spherical Aberration After DSAEK Measured with Pentacam System Orkun Muftuoglu, Pawan Prasher, R. Wayne Bowman, Steven.

Effects of IOP Lowering Agents on Myopic Regression after Refractive Surgery Lim, Taehyung M.D., Hong, So Jin M.D., Cho, Beom Jin M.D., Ph.D. Chung Kyu-Hyung.

Blended vision after bilateral monofocal cataract surgery: an evaluation of spectacle independence and vision related quality of life Allison Landes, MD.

Phacoemulsification in eyes with previous anterior chamber phakic IOL surgery Walton Nosé, MD, PhD 1,2 Adriana dos Santos Forseto, MD 1 Mariana Ávila,

Theme 2: The theoretical eye Form and dimensions of the eye Optical constants of the eye Optical Geometry applied to the eye Schematic model of the eye.

Biometric Accuracy in High Hypermetropes and Myopes

Topical Cyclosporine for Postoperative use in PRK and LASIK: Preliminary Results LCDR David D. Hessert, M.D. Ophthalmology Chief Resident Naval Medical.

Cataract Surgery After Trabeculectomy: The Effect on Trabeculectomy Function Husain R, Liang S, Foster PJ. Cataract surgery after trabeculectomy: the effect.

INTRAOCULAR LENS POWER CALCULATION BY IMMERSION A-SCAN BIOMETRY VERSUS CONTACT A-SCAN BIOMETRY MEASUREMENTS BEFORE CATARACT SURGERY Burak Bilgin**, M.D.,

Paul “Butch” Harton, MD Harbin Clinic Eye Center Rome, GA USA ASCRS Boston Poster, 2010 The Author has no financial interest in the subject matter of this.

Sonia Yoo, MD 1 Fernanda Piccoli, MD 1 Artur Schmitt, MD 1 Takeshi Ide, MD 1 Tsontcho Ianchulev, MD 2 Authors have no financial interest in this subject.

Phoebe D. Lenhart, M.D. 1, Amy K. Hutchinson, M.D. 1, Michael J. Lynn, M.S. 2, Scott R. Lambert M.D. 1 1 Department of Ophthalmology, Emory University,

Khairidzan Mohd Kamal MD

Endothelial Keratoplasty in Patients With an Anterior Chamber Intraocular Lens: A Montreal Experience Georges M. Durr, MD 1,2 Johanna Choremis, MD, FRCSC.

Partial Coherence Interferometry Failure Rate in a Teaching Hospital Leslie A. Wei 1,2, BA, Nickolaus P. Katsoulakis 2, MD, Theodoros Filippopoulos 3,

The Effect of Corneal Anterior Surface Eccentricity on Astigmatism after Cataract Surgery Choul Yong Park MD 1 Sung Jun Lee MD 1 Prabjot Channa MD 2 Roy.

Adriana S. Forseto1, MD Walton Nosé1,2, MD

Nang-Hee Song(MD) 1, Jae-Woong Koh (MD/PhD) 1, Gil-Joong Yoon (MD/PhD) 2 Department of Ophthalmology, Chosun University College of Medicine, Gwangju, Republic.

IOL Calculations Based on Partial Biometry in Humanitarian Missions Joseph Schmitz, MD Kimberly Davis, MD, FACS Scott McClatchey, MD The authors have no.

Sherman W. Reeves, MD, MPH 1,3,4 ; Jacob A. Kozisek, OD 1,2 ; Noumia Cloutier-Gill, OD 1,2 ; David R. Hardten, MD 1,2,3,4 Accuracy of Scheimpflug Imaging.

Long-Term Longitudinal Change in Keratometry After Pediatric Cataract Surgery Rupal H. Trivedi, MD MSCR M. Edward Wilson, MD Osman Melih, MD Dipankar Bandyopadhyay,

Visual and IOP Outcomes after PRK in Pigment Dispersion Syndrome [Poster Number: P190] Kraig S. Bower, Denise A. Sediq, Charles D. Coe, Keith Wroblewski,

LogMAR-Analysis of multifocal intraocular lenses: Clinical performance A. Mannsfeld, I.-J. Limberger, A. Ehmer, M.P. Holzer, G. U.Auffarth International.

Comparison of Central Corneal Thickness, Anterior Chamber Depth, and Central Corneal Power Measurements between Two Scheimpflug Imaging Systems Yuichi.

Post-LASIK Intraocular Lens Power Adjustment Nomogram Joseph Diehl Kevin Miller, MD Jules Stein Eye Institute, David Geffen School of Medicine.

Comparison of visual function following piggyback implantation of Acrysof ReSTOR intraocular lenses with Tecnis multifocal ZM900 intraocular lenses. Rodrigo.

Investigation of Multifocal Toric IOLs to Compensate for Corneal Astigmatism and to Provide Near, Intermediate, and Distance Vision José L. Rincón, MD.

Preliminary Results after Cataract Surgery with the Aspheric Acrysof ReSTOR IOL to Correct Presbyopia Meeting of the ASCRS Chicago 8-10 February 2007 R.M.M.A.

COMPARISON AND EVALUATION OF OCULAR BIOMETRY USING A NEW NON-CONTACT OPTICAL LOW COHERENCE REFLECTOMETER David Goldblum 1,3, Kaspar Rohrer 1, Rudolf Waelti.

Simulated Experiments on IOL Power Calculation Using Anterior Segment OCT Dong Hyun Jo, M.D., 1,2 Mee Kum Kim, M.D., 1,2 Won Ryang Wee, M.D. 1,2 1 Department.

Management of corneal perforations and deep ulcers with patch grafts Dariusz Dobrowolski¹, Edward Wylęgała¹ ׳ ², Dorota Tarnawska¹, Dominika Janiszewska¹.

Poster# P36 Comparison of Techniques of Measuring Anterior Chamber Depth and Corneal Curvature in Indian Eyes Sujata Das, MS, FRCS Anjula Kumari, B.Optom.

Vinohrady Teaching Hospital, Prague, Czech Republic Vinohrady Teaching Hospital, Prague, Czech Republic M. Vokrojova MD, M. Vokrojova MD, D. Sivekova MD,

Intraocular Lens Outcomes: Comparison of Technologies and Formulas Carolina Eyecare Physicians, LLC Research Assistant Professor of Ophthalmology Storm.

Changes of Axial Length After LASIK Surgery: A 3-Year Follow-Up Study

Corneal Pachymetry in Prediction of Refraction After Cataract Surgery

Refractive outcomes of intraoperative wavefront aberrometry versus optical biometry alone for intraocular lens power calculation Zina Zhang MD1, Logan.

Early Experience with Descemet’s Stripping Automated Endothelial Keratoplasty Combined with Phacoemulsification: Clinical and Refractive Outcome University.

Naval Medical Center, San Diego

Associate Professor of Ophthalmology

Barry A Schechter, MD Florida Eye Microsurgical Institute

IN THE NAME OF GOD.

Goals: Minimize cost Maximize suitable IOL powers

Factors Potentially Affecting the Accuracy of Methods to Calculate Effective Refractive Power After Keratorefractive Surgery Helga P Sandoval, MD, MSCR,

Khairidzan Mohd Kamal MD

Michael Goodman, Alexandra Paul and Andrew Hsu

Presentation transcript:

Reanalysis of Refractive Growth in Pediatric Aphakia and Pseudophakia Susan Whitmer, MD 1 Aurora Xu 2 Scott McClatchey, MD 1,3,4 1 Naval Medical Center San Diego 2 Byram Hills High School, Armonk NY 3 Uniformed Services University of the Health Sciences 4 Loma Linda University The authors have no financial interest in the subject matter of this poster. The views expressed in this article are those of the authors and do not necessarily reflect the official policy or position of the Department of the Navy, Department of Defense, or the United States Government.

Introduction The growth of an aphakic or pseudophakic eye results in myopic shift. The vertex distance of a spectacle lens causes the effective power to be higher at the cornea; this is greatest in babies less than 6 months of age.

In utero “Aphakic” refraction +100 D BUT THIS CANNOT BE: 100 D at spectacle plane => -500 D vergence at cornea Adult “Aphakic” refraction +11 D At birth “Aphakic” refraction +21 D Vertex distance artifact in RRG

Purpose The current model for logarithmic refractive growth (RRG2) is defined by the slope of the line of aphakic refraction at the spectacle plane vs. adjusted age. We developed a new model “RRG3”, to address the optical artifact induced by the vertex distance.

Methods We reanalyzed eyes previously studied for RRG 1,2. Children 10 years old or younger, at the time of cataract surgery, were included. Each study eye had recorded follow-up refraction data of at least 3.6 yr and at least equal to the age at first refraction yr. For bilateral cases, only data from the right eye was used. Based upon the vergence at the different surfaces in the eye, a new formula, “W”, was developed to calculate the IOL power required for a given refraction, axial length and IOL A constant: IOL power = vergence back of IOL – vergence front of IOL We assumed that the radius of curvature of the cornea, axial length and thickness of the cornea are all proportionate, with a limit to the anterior cornea radius of 8.9mm.

Methods Using Excel Visual Basic for Applications and iteration, we calculated the IOL power for emmetropia (aphakic refraction at the natural lens plane), based upon the available data for the study eyes at each age. From the IOL power for emmetropia, RRG3 was calculated as follows: where AdjAR is the adjusted aphakic refraction, calculated for each individual eye at the natural lens plane, and AdjAge is the same adjusted age we used for RRG2 (i.e., age yr). The “1" and “2" refer to the initial and follow-up measurements, respectively.

Results 78 pseudophakic and 70 aphakic eyes were analyzed. 78 pseudophakic and 70 aphakic eyes were analyzed. Age at surgery (yrs) < 6 months at surgery Mean follow- up time (yrs) Vision Pseudophakic % ≥ 20/ / ≤ 20/120 Aphakic % ≥ 20/ / ≤ 20/100

Results Age at Surgery RRG3 (D) Surgery at any age RRG3 (D) Pseudophakic < 6 months-11 ± 4 P = ± 6 P < 0.01 ≥ 6 months-14 ± 7 Aphakic < 6 months-15 ± 9 P = ± 10 ≥ 6 months-17 ± 10

Conclusions  The data did not show a difference in RRG3 between eyes that had surgery at less than 6 months of age and those that had surgery at 6 months of age or after.  There was a significant difference in RRG3 for pseudophakic and aphakic eyes.

Discussion The observation that RRG3 was not found to be different for the different age groups is consistent with the hypothesis that the observed difference in RRG was due to the vertex distance artifact. The observation that RRG3 was not found to be different for the different age groups is consistent with the hypothesis that the observed difference in RRG was due to the vertex distance artifact. The "W formula," from which RRG3 was calculated, needs further testing in infant aphakic and pseudophakic eyes to assess its accuracy. The "W formula," from which RRG3 was calculated, needs further testing in infant aphakic and pseudophakic eyes to assess its accuracy.

References 1. McClatchey SK, Dahan E, Maselli E, Gimbel HV, Wilson ME, Lambert SR, Buckley EG, Freedman SF, Plager DA, and Parks MM. “A Comparison of the Rate of Refractive Growth in Pediatric Aphakic and Pseudophakic Eyes.” Ophthalmology 2000; 107: McClatchey SK and Hofmeister EM. “The Optics of Aphakic and Pseudophakic Eyes in Childhood.” Survey of Ophthalmology 2010; 55.2: Hoffer KJ. “The Hoffer Q formula: A comparison of theoretic and regression formulas.” J Cataract Refract Surg 1993; 19: Holladay JT, Prager TC, Chandler TY, Musgrove KH, Lewis JW, and Ruiz RS. “A three-part system for refining intraocular lens.” J Cataract Refract Surg 1988; 14.1: Lambert SR. “The Effect of Age on the Retardation of Axial Elongation Following a Lensectomy in Infant Monkeys.” Arch Ophthalmol 1998; 116: Lambert SR, Fernandes A, Drews-Botsch C and Tigges M. “Pseudophakia Retards Axial Elongation in Neonatal Monkey Eyes.” Investigative Ophthalmology and Visual Science 1996; 37.2: McClatchey SK and Parks MM. “Theoretic Refractive Changes after Lens Implantation in Childhood.” Ophthalmology 1997; 104: