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VOLUME 50 , ISSUE 1ENG ( February, 2022 ) > List of Articles

Understanding High Order Aberrations

Eng. Steven Payan, Juan Sampaolesi

Keywords : High Order Aberrations (HOAs), Hartmann Shack Principle, Dynamic Skiascopy, Placido Disc Topography, Wavefront Technology, Dysfunctional Lens Index (DLI), and Chang Analysis

Citation Information : Payan ES, Sampaolesi J. Understanding High Order Aberrations. 2022; 50 (1ENG):4-26.

DOI: 10.5005/hoe-10101-50101

Published Online: 17-02-2022

Copyright Statement:  Copyright © 2022; Jaypee Brothers Medical Publishers (P) Ltd.


Abstract

This article explains the clinical applications of Higher Order Aberrations (HOAs) and the optics behind wavefront technologies available to measure them. The goal of Ray-Tracing aberrometry (iTrace) is highlighted in separating the aberrations generated by the cornea from those generated by the lens. The total eye aberrations represent the image on the retina and demonstrate the patient's overall quality of vision.

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  1. Light and Matter: Electromagnetism, Optics, Spectroscopy and Lasers, Y. B. Band, John Wiley & Sons, 2010.
  2. Hecht, Eugene (1987). Optics (2nd ed.). Addison Wesley. pp. 15-16.
  3. Westheimer, G (2008) “Directional sensitivity of the retina: 75 years of Stiles-Crawford effect”. Proceedings of the Royal Society B: Biological Sciences.
  4. Stiles, W. S; Crawford, B. H (1993).””The Luminous Efficiency of Rays Entering the Eye Pupil at Different Points”. Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character.
  5. van Saarloos, P. Comparison of the iTrace vs Nidek Optical Path Difference (OPD) on a Model Eye Central. Poster session presented at: The Annual Meeting of the Association for Research in Vision and Ophthalmology; 2012 May 06 -10; Fort Lauderdale, FL.
  6. Zhangliang Li, Liuqing Yu, Ding Chen, Pingjun Chang, Dandan Wang, Yinying Zhao, Songjia Liu, Yun-E Zhao. Dysfunctional Lens Index Serves as a Novel Surgery Decision-Maker for Age-Related Nuclear Cataracts. Curr Eye Res. 2019 Jul;44(7):733-738. doi: 10.1080/02713683.2019.1584676. Epub 2019 Mar 1.
  7. Faria-Correia F, Ramos I, Lopes B, Monteiro T, Franqueira N, Ambrósio R Jr. Correlations of Objective Metrics for Quantifying Dysfunctional Lens Syndrome with Visual Acuity and Phacodynamics. doi: 10.3928/1081597X-20161206-05.
  8. Faria-Correia F, Ramos I, Lopes B, Monteiro T, Franqueira N, Ambrosio R, Jr. Comparison of Dysfunctional Lens Index and Scheimpflug Lens Densitometry in the Evaluation of Age-Re- lated Nuclear Cataracts. J Refract Surg 2016; 32:244-8.
  9. Ambrosio Jr R. Integration of Corneral Topography and Wave- front. Review of Refractive Surgery 2004:1-4.
  10. E. Moreno-Barriuso & R. Navarro (2000). “Laser ray tracing versus Hartmann--Shack sensor for measuring optical aberrations in the human eye”. JOSA A. Optical Society of America. 17 (6): 974-985. Bibcode:2000JOSAA. doi:10.1364/JOSAA.17.000974.
  11. Thomas Kohnen & Douglas D. Koch (2006). Cataract and refractive surgery, Volume 2. Springer. p. 55. ISBN 978-3-540-30795-2.
  12. Akondi, Vyas; Dubra, Alfredo (August 2019). “Accounting for focal shift in the Shack–Hartmann wavefront sensor”. Optics Letters. 44 (17): 4151-4154. doi: 10.1364/OL.44.004151.
  13. Akondi, Vyas; Steven, Samuel; Dubra, Alfredo (August 2019) “Centroid error due to non-uniform lenslet illumination in the Shack–Hartmann wavefront sensor”.Optics Letters. 44 (17) 4167-4170. doi: 10.1364/OL.44.004167.2003; 110:840-859.
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