Changes of Functional Optical Zone After LASIK for Hyperopia and Hyperopic Astigmatism

Journal of Refractive Surgery
Christian Roesler, Thomas Kohnen

Abstract

To evaluate which factors may influence the size of the postoperative functional optical zone after hyperopic LASIK. Thirty-three eyes with a mean spherical equivalent of +3.55 ± 1.28 diopters (D) underwent LASIK with a Technolas 217 C-LASIK laser (Bausch & Lomb Surgical, Munich, Germany). After 1 week and 1, 4, and 12 months, the authors examined refraction, corneal refractive power by means of computerized videokeratography (Technomed C-Scan; Baesweiler, Germany), and uncorrected/corrected distance visual acuity (UDVA/CDVA). According to the degree of hyperopia, they were divided into low hyperopia (spherical equivalent ≤ 3.00 D) and high hyperopia (spherical equivalent > 3.00 D) groups. One year postoperatively, 82% of all eyes had a UDVA of 0.5 or better; in 88%, the spherical equivalent did not deviate more than 1.00 D from the attempted value. Three eyes were slightly undercorrected. After an initial overcorrection (-0.27 D) with subsequent regression, the refraction remained stable at +0.17 D from the fourth postoperative month (low hyperopia group: +0.14 D; high hyperopia group: +0.19 D after 1 year). After 1 year, the functional optical zone diminished by 32%; the reduction was more pronounced in eyes with higher hyper...Continue Reading

References

Jan 1, 1991·Archives of Ophthalmology·J T HolladayB Fielding
Jan 1, 1986·Ophthalmic & Physiological Optics : the Journal of the British College of Ophthalmic Opticians (Optometrists)·H Saunders
Aug 1, 1997·Journal of Refractive Surgery·A S ChayetA Castellanos
Nov 14, 1997·Journal of Cataract and Refractive Surgery·K Scher, P S Hersh
Jul 31, 1998·Journal of Cataract and Refractive Surgery·S G FarahJ Wong
Aug 26, 1998·Archives of Ophthalmology·C E MartínezH C Howland
Aug 28, 1998·Journal of Cataract and Refractive Surgery·C J Argento, M J Cosentino
Apr 13, 1999·Journal of Cataract and Refractive Surgery·H S Geggel, A R Talley
Jun 12, 1999·Ophthalmology·K AtteboP Mitchell
Jan 6, 2000·Current Opinion in Ophthalmology·D P O'Brart
Sep 29, 2000·Journal of Cataract and Refractive Surgery·C J Argento, M J Cosentino
May 31, 2002·Journal of Cataract and Refractive Surgery·Brian S Boxer WachlerDamien Goldberg
Sep 14, 2002·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·A Mirshahi, T Kohnen
Sep 17, 2002·Journal of Cataract and Refractive Surgery·Chun Chen ChenDimitri T Azar
Oct 22, 2002·Journal of Cataract and Refractive Surgery·Ioannis G PallikarisAristofanis I Pallikaris
Aug 4, 2004·Ophthalmology·Gary A VarleyUNKNOWN Ophthalmic Technology Assessment Committee Refractive Surgery Panel, Ameican Academy of Ophthalmology
Feb 5, 2005·Ophthalmology·Philip D JaycockJohn Marshall
Feb 22, 2005·Journal of Cataract and Refractive Surgery·Mujtaba A QaziJay S Pepose
Mar 16, 2005·Journal of Cataract and Refractive Surgery·Richard L NepomucenoRyan Scruggs
May 19, 2005·Journal of Cataract and Refractive Surgery·George J C JinKevin H Merkley
Apr 7, 2009·Ophthalmology·Kerry D SolomonUNKNOWN Joint LASIK Study Task Force
Oct 29, 2011·Journal of Cataract and Refractive Surgery·Silvia SchumacherMichael Mrochen
Jul 23, 2013·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·T Kohnen, O K Klaproth
Mar 4, 2014·Journal of Cataract and Refractive Surgery·Theodore A PasqualiRonald R Krueger
Jun 19, 2014·Klinische Monatsblätter für Augenheilkunde·T KohnenUNKNOWN German Ophthalmology Society and the German Professional Association of Ophthalmologists
Oct 16, 2015·Journal of Refractive Surgery·Ana B Plaza-PucheJorge L Alió
Jun 4, 2016·Journal of Cataract and Refractive Surgery·Reena DaveJohn Marshall
Aug 18, 2016·Journal of Cataract and Refractive Surgery·Helga P SandovalKerry D Solomon

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Citations

May 31, 2019·Der Ophthalmologe : Zeitschrift der Deutschen Ophthalmologischen Gesellschaft·Christoph Lwowski, Thomas Kohnen

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Software Mentioned

R Foundation for Statistical Computing
DataGraph
PlanoScan
R
Technomed C - Scan
- Statistics
Visual Data Tools

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