Measurement of angle kappa and centration in refractive surgery

Current Opinion in Ophthalmology
Choul Yong ParkRoy S Chuck

Abstract

Consideration of angle kappa is important for correct centration of refractive treatments. Decentered refractive treatment can cause photic phenomena including glare, halo, and deterioration of vision. This review highlights the concept of angle kappa, its measurement and distribution in normal populations, and the methods to compensate for large angle kappa in refractive surgery using laser or intraocular lenses (IOLs). Determination of the treatment center is very important in refractive surgery. Moving the ablation center from the center of the entrance pupil to points near visual axis, such as the corneal light reflex (line of sight) or corneal vertex normal, results in less induction of higher order aberrations (including coma aberration) and either the same or better visual outcomes both in hyperopic and myopic eyes when compared to laser ablation centered on the entrance pupil. Decentration of multifocal IOLs can result in deterioration of postoperative visual function with induction of higher order aberrations. The occurrence of photic phenomena positively correlated with preoperative values of angle kappa. There is a growing body of evidence that emphasizes the consideration of angle kappa in refractive surgery. Ignori...Continue Reading

References

Mar 22, 2003·Journal of Cataract and Refractive Surgery·Michael BueelerTheo Seiler
Jun 5, 2004·Journal of Cataract and Refractive Surgery·Richard L NepomucenoMichelle Sato
Feb 22, 2005·Journal of Cataract and Refractive Surgery·Mujtaba A QaziJay S Pepose
Feb 24, 2006·Journal of Vision·Pablo ArtalJuan Tabernero
Feb 20, 2007·Journal of AAPOS : the Official Publication of the American Association for Pediatric Ophthalmology and Strabismus·Hikmet BasmakNilgun Yildirim
Oct 4, 2007·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Juan TaberneroPablo Artal
Dec 7, 2007·Strabismus·Hikmet BasmakSumru Yurdakul
Jul 29, 2008·Investigative Ophthalmology & Visual Science·Maria Clara ArbelaezSamuel Arba-Mosquera
May 26, 2009·Journal of Cataract and Refractive Surgery·Maria A WoodwardR Doyle Stulting
Feb 5, 2010·Journal of Refractive Surgery·Hassan HashemiAkbar Fotouhi
Jan 5, 2011·Journal of Vision·Esther BerrioPablo Artal
Mar 15, 2011·Journal of Cataract and Refractive Surgery·Niels E de VriesRudy M M A Nuijts
Aug 23, 2011·Journal of Cataract and Refractive Surgery·Gaurav PrakashSoosan Jacob

❮ Previous
Next ❯

Citations

Oct 12, 2012·PloS One·Filomena J RibeiroJoão M Dias
Jan 1, 2014·Oman Journal of Ophthalmology·Majid MoshirfarValliammai Muthappan
Apr 29, 2014·Journal of Cataract and Refractive Surgery·Matthew A Powers, Malik Y Kahook
Apr 26, 2014·Journal of Refractive Surgery·Emmanuel GuilbertDamien Gatinel
Feb 11, 2015·Journal of Cataract and Refractive Surgery·Anastasios John KanellopoulosStella Georgiadou
Mar 13, 2015·Iranian Red Crescent Medical Journal·Hamid GharaeeMostafa Abrishami
May 5, 2017·Korean Journal of Ophthalmology : KJO·Joon Hyung YeoJeong Kyu Lee
Jul 13, 2018·Journal of Refractive Surgery·Gernot SteinwenderAndreas Wedrich
Nov 30, 2018·Journal of Vision·Yumiko Otsuka, Colin W G Clifford
Dec 13, 2018·Journal of Refractive Surgery·Dan Z ReinsteinRyan S Vida
Mar 30, 2019·Clinical & Experimental Optometry : Journal of the Australian Optometrical Association·Cem CankayaAbuzer Gunduz
Sep 18, 2017·Journal of Cataract and Refractive Surgery·Annette HarrerOliver Findl
Jul 22, 2019·Journal of Cataract and Refractive Surgery·Yana FuYun-E Zhao
Jul 24, 2018·Journal of Cataract and Refractive Surgery·Yingying QiLiting Hu
Feb 9, 2019·Journal of Cataract and Refractive Surgery·Vinicius S De StefanoRonald R Krueger
Jul 3, 2019·Journal of Cataract and Refractive Surgery·Andreas FringsToam Katz
Jan 29, 2019·Journal of Cataract and Refractive Surgery·Dan Z ReinsteinTimothy J Archer
May 29, 2020·Clinical & Experimental Ophthalmology·James Y JiangMichael Lawless
Jun 20, 2018·Ophthalmology and Therapy·Ramón Ruiz Mesa, Tiago Monteiro
Jun 8, 2017·International Ophthalmology Clinics·Rishabh C Date, Zaina N Al-Mohtaseb
Mar 20, 2018·Biomedical Optics Express·Hyung-Jin KimBeop-Min Kim
Dec 31, 2019·Journal of Ophthalmology·Cecilio Velasco-BaronaRoberto Gonzalez-Salinas
Nov 15, 2016·Journal of Cataract and Refractive Surgery·Russell PokroyIgor Kaiserman
Jan 5, 2021·Graefe's Archive for Clinical and Experimental Ophthalmology = Albrecht Von Graefes Archiv Für Klinische Und Experimentelle Ophthalmologie·Andrzej Grzybowski, Timo Eppig
Sep 7, 2019·Asia-Pacific Journal of Ophthalmology·Sharon S W ChowTommy C Y Chan
Apr 11, 2021·Journal français d'ophtalmologie·M DelbarreF Froussart-Maille
Sep 2, 2021·Journal of Cataract and Refractive Surgery·Li LiZheng Wang

❮ Previous
Next ❯

Related Concepts

Trending Feeds

COVID-19

Coronaviruses encompass a large family of viruses that cause the common cold as well as more serious diseases, such as the ongoing outbreak of coronavirus disease 2019 (COVID-19; formally known as 2019-nCoV). Coronaviruses can spread from animals to humans; symptoms include fever, cough, shortness of breath, and breathing difficulties; in more severe cases, infection can lead to death. This feed covers recent research on COVID-19.

Blastomycosis

Blastomycosis fungal infections spread through inhaling Blastomyces dermatitidis spores. Discover the latest research on blastomycosis fungal infections here.

Nuclear Pore Complex in ALS/FTD

Alterations in nucleocytoplasmic transport, controlled by the nuclear pore complex, may be involved in the pathomechanism underlying multiple neurodegenerative diseases including Amyotrophic Lateral Sclerosis and Frontotemporal Dementia. Here is the latest research on the nuclear pore complex in ALS and FTD.

Applications of Molecular Barcoding

The concept of molecular barcoding is that each original DNA or RNA molecule is attached to a unique sequence barcode. Sequence reads having different barcodes represent different original molecules, while sequence reads having the same barcode are results of PCR duplication from one original molecule. Discover the latest research on molecular barcoding here.

Chronic Fatigue Syndrome

Chronic fatigue syndrome is a disease characterized by unexplained disabling fatigue; the pathology of which is incompletely understood. Discover the latest research on chronic fatigue syndrome here.

Evolution of Pluripotency

Pluripotency refers to the ability of a cell to develop into three primary germ cell layers of the embryo. This feed focuses on the mechanisms that underlie the evolution of pluripotency. Here is the latest research.

Position Effect Variegation

Position Effect Variagation occurs when a gene is inactivated due to its positioning near heterochromatic regions within a chromosome. Discover the latest research on Position Effect Variagation here.

STING Receptor Agonists

Stimulator of IFN genes (STING) are a group of transmembrane proteins that are involved in the induction of type I interferon that is important in the innate immune response. The stimulation of STING has been an active area of research in the treatment of cancer and infectious diseases. Here is the latest research on STING receptor agonists.

Microbicide

Microbicides are products that can be applied to vaginal or rectal mucosal surfaces with the goal of preventing, or at least significantly reducing, the transmission of sexually transmitted infections. Here is the latest research on microbicides.

Related Papers

Oman Journal of Ophthalmology
Majid MoshirfarValliammai Muthappan
International Ophthalmology
Siamak Zarei-GhanavatiSoamaye Ghasemi-Moghadam
© 2021 Meta ULC. All rights reserved