Astigmatism and vision:should all astigmatism always be corrected?


As technology and medical devices improve, there is much interest in when and how astigmatism should be corrected with refractive surgery. Astigmatism can be corrected by most forms of refractive surgery, such as using excimer lasers algorithms to ablate the cornea to compensate for the magnitude of refractive error in different meridians. Correction of astigmatism at the time of cataract surgery is well developed and can be achieved through incision placement, relaxing incisions and toric intraocular lens (IOL) implantation. This was less of an issue in the past when there was a lower expectation to be spectacle independent after cataract surgery, in which case the residual refractive error, including astigmatism, could be compensated for with spectacle lenses. The issue of whether presurgical astigmatism should be corrected can be considered separately depending on whether a patient has residual accommodation, and the type of refractive surgery under consideration. We have previously reported on the visual impact of full correction of astigmatism, rather than just correcting the mean spherical equivalent. Correction of astigmatism as low as 1.00 dioptres significantly improves objective and subjective measures of functional vision in prepresbyopes at distance and near.

Publication DOI:
Divisions: College of Health & Life Sciences > School of Optometry > Optometry & Vision Science Research Group (OVSRG)
College of Health & Life Sciences
College of Health & Life Sciences > School of Optometry > Vision, Hearing and Language
College of Health & Life Sciences > School of Optometry > Optometry
Additional Information: Published by
Uncontrolled Keywords: astigmatism,Toric,adaptation,intraocular lens,reading,visual acuity,Cellular and Molecular Neuroscience,Sensory Systems,Ophthalmology
Publication ISSN: 1468-2079
Last Modified: 17 Jun 2024 07:13
Date Deposited: 12 Mar 2014 10:20
Full Text Link: http://bjo.bmj. ... /content/98/1/2
Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Editorial
Published Date: 2014-01
Authors: Wolffsohn, James S. (ORCID Profile 0000-0003-4673-8927)
Bhogal, Gurpreet (ORCID Profile 0000-0001-8742-6319)
Shah, Sunil (ORCID Profile 0000-0002-5373-5305)



Version: Draft Version

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