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Aiming for emmetropia after cataract surgery: Swedish National Cataract Register study

Behndig, Anders; Montan, Per; Stenevi, Ulf; Kugelberg, Maria; Zetterstrom, Charlotta and Lundström, Mats LU (2012) In Journal of Cataract and Refractive Surgery 38(7). p.1181-1186
Abstract
PURPOSE: To assess and analyze refractive outcome after cataract surgery in Sweden from 2008 though 2010. SETTING: Swedish cataract surgery units participating in outcome registration of National Cataract Register. DESIGN: Cohort study. METHODS: Planned and actual postoperative refractions were analyzed for cataract procedures and preoperative and postoperative corneal astigmatism for procedures performed in 2008 though 2010. Induced astigmatism was calculated with Naeser and Behrens polar coordinates. RESULTS: Postoperative refraction was analyzed for 17 056 procedures and corneal astigmatism for 7448 procedures. Emmetropia was targeted in 78.1% of eyes and achieved in 52.7%; 43.0% had less than 1.00 diopter (D) of astigmatism. "Reading... (More)
PURPOSE: To assess and analyze refractive outcome after cataract surgery in Sweden from 2008 though 2010. SETTING: Swedish cataract surgery units participating in outcome registration of National Cataract Register. DESIGN: Cohort study. METHODS: Planned and actual postoperative refractions were analyzed for cataract procedures and preoperative and postoperative corneal astigmatism for procedures performed in 2008 though 2010. Induced astigmatism was calculated with Naeser and Behrens polar coordinates. RESULTS: Postoperative refraction was analyzed for 17 056 procedures and corneal astigmatism for 7448 procedures. Emmetropia was targeted in 78.1% of eyes and achieved in 52.7%; 43.0% had less than 1.00 diopter (D) of astigmatism. "Reading myopia" of -3.5 to -1.6 D was targeted in 7.0% of eyes and achieved in 7.8%. Planned hyperopia greater than 1.0 D or myopia greater than -3.5 D was rare. The mean absolute biometry prediction error was 0.402 D +/- 0.338 (SD) in all eyes; however, astigmatic eyes and eyes planned for myopia or hyperopia had higher biometry prediction errors. Younger patients were more often astigmatic and planned for a more myopic outcome. Preoperatively, one third of eyes had more than 1.0 D of corneal astigmatism; postoperatively this figure was largely unaltered. The mean induced astigmatism was 0.525 +/- 0.804 D in all eyes. CONCLUSIONS: Emmetropia (spherical equivalent -0.5 to + 0.5 D and <1.0 D astigmatism) is the goal in most cataract cases but was reached in only 55% of eyes planned for emmetropia. Factors precluding emmetropia included remaining corneal astigmatism and biometry prediction errors in astigmatic and ametropic eyes. (Less)
Please use this url to cite or link to this publication:
author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Journal of Cataract and Refractive Surgery
volume
38
issue
7
pages
1181 - 1186
publisher
Elsevier
external identifiers
  • wos:000306164200012
  • scopus:84862897780
ISSN
1873-4502
DOI
10.1016/j.jcrs.2012.02.035
language
English
LU publication?
yes
id
35850204-a5bf-4203-b974-48bcae5dcd94 (old id 2998073)
alternative location
http://www.ncbi.nlm.nih.gov/pubmed/22727287
date added to LUP
2012-09-03 07:18:35
date last changed
2017-11-05 03:21:22
@article{35850204-a5bf-4203-b974-48bcae5dcd94,
  abstract     = {PURPOSE: To assess and analyze refractive outcome after cataract surgery in Sweden from 2008 though 2010. SETTING: Swedish cataract surgery units participating in outcome registration of National Cataract Register. DESIGN: Cohort study. METHODS: Planned and actual postoperative refractions were analyzed for cataract procedures and preoperative and postoperative corneal astigmatism for procedures performed in 2008 though 2010. Induced astigmatism was calculated with Naeser and Behrens polar coordinates. RESULTS: Postoperative refraction was analyzed for 17 056 procedures and corneal astigmatism for 7448 procedures. Emmetropia was targeted in 78.1% of eyes and achieved in 52.7%; 43.0% had less than 1.00 diopter (D) of astigmatism. "Reading myopia" of -3.5 to -1.6 D was targeted in 7.0% of eyes and achieved in 7.8%. Planned hyperopia greater than 1.0 D or myopia greater than -3.5 D was rare. The mean absolute biometry prediction error was 0.402 D +/- 0.338 (SD) in all eyes; however, astigmatic eyes and eyes planned for myopia or hyperopia had higher biometry prediction errors. Younger patients were more often astigmatic and planned for a more myopic outcome. Preoperatively, one third of eyes had more than 1.0 D of corneal astigmatism; postoperatively this figure was largely unaltered. The mean induced astigmatism was 0.525 +/- 0.804 D in all eyes. CONCLUSIONS: Emmetropia (spherical equivalent -0.5 to + 0.5 D and &lt;1.0 D astigmatism) is the goal in most cataract cases but was reached in only 55% of eyes planned for emmetropia. Factors precluding emmetropia included remaining corneal astigmatism and biometry prediction errors in astigmatic and ametropic eyes.},
  author       = {Behndig, Anders and Montan, Per and Stenevi, Ulf and Kugelberg, Maria and Zetterstrom, Charlotta and Lundström, Mats},
  issn         = {1873-4502},
  language     = {eng},
  number       = {7},
  pages        = {1181--1186},
  publisher    = {Elsevier},
  series       = {Journal of Cataract and Refractive Surgery},
  title        = {Aiming for emmetropia after cataract surgery: Swedish National Cataract Register study},
  url          = {http://dx.doi.org/10.1016/j.jcrs.2012.02.035},
  volume       = {38},
  year         = {2012},
}