Results 271 to 280 of about 88,327 (313)
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Ophthalmic and Physiological Optics, 2000
SummaryThe quantitative representation and analysis of astigmatism present difficulties for the researcher. The case is made that the difficulties arise because of the way astigmatism is conceived and defined. In most cases astigmatism is regarded as cylinder.
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SummaryThe quantitative representation and analysis of astigmatism present difficulties for the researcher. The case is made that the difficulties arise because of the way astigmatism is conceived and defined. In most cases astigmatism is regarded as cylinder.
openaire +2 more sources
Astigmatic keratotomy for post-keratoplasty astigmatism
Journal of Cataract and Refractive Surgery, 2006To assess astigmatic keratotomy as a means of managing post-keratoplasty astigmatism in the era of excimer laser refractive surgery.Moorfields Eye Hospital, London, England.Fifty paired arcuate keratotomies were performed with refractive and topographic guidance.
Linda A. Ficker, Tom R.G. Poole
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Femtosecond laser astigmatic keratotomy for postkeratoplasty astigmatism
Canadian Journal of Ophthalmology, 2008Two eyes of 2 patients with high astigmatism following penetrating keratoplasty were treated with femtosecond laser-assisted paired arcuate keratotomies in the donor cornea. Outcome measures included best-corrected visual acuity, refraction, keratometry, and topographic findings.
Dimitri T. Azar +2 more
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Measurement of Posterior Corneal Astigmatism by the IOLMaster 700.
Journal of refractive surgery, 2018PURPOSE To provide the first description of posterior corneal astigmatism as measured by the IOLMaster 700 (Carl Zeiss Meditec, Jena, Germany) and assess how its characteristics compare to previous measurements from other devices.
Benjamin R LaHood, M. Goggin
semanticscholar +1 more source
The impact of uncorrected astigmatism on night driving performance
Ophthalmic & physiological optics, 2019To investigate the effect of uncorrected astigmatism on night driving performance on a closed‐road circuit.
A. Black +3 more
semanticscholar +1 more source
How much astigmatism to treat in cataract surgery.
Current Opinion in Ophthalmology, 2019PURPOSE OF REVIEW Astigmatism correction in cataract surgery is a common surgical challenge. Although there are numerous approaches to its treatment during cataract surgery, there remains a lack of consensus on what level of postoperative astigmatism to ...
Rohini R. Sigireddi, Mitchell P. Weikert
semanticscholar +1 more source
Acta Ophthalmologica, 1982
The bundle of rays from the chamber angle will pass the posterior surface of the contact‐glass at a large angle. This will result in considerable astigmatism. Different methods to reduce or eliminate the astigmatism are discussed.
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The bundle of rays from the chamber angle will pass the posterior surface of the contact‐glass at a large angle. This will result in considerable astigmatism. Different methods to reduce or eliminate the astigmatism are discussed.
openaire +3 more sources
Influence of posterior corneal astigmatism on total corneal astigmatism in eyes with moderate to high astigmatism [PDF]
Journal of Cataract and Refractive Surgery, 2014 To evaluate the influence of posterior corneal astigmatism on total corneal astigmatism in patients with 1.00 diopter (D) or more of corneal astigmatism.Private practice, Bologna, Italy.Prospective case series.Corneal astigmatism was measured using a Scheimpflug camera combined with a corneal topographer (Sirius).
Kristian Næser +4 more
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Journal of refractive surgery, 2018
PURPOSE To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive ...
I. Jun +6 more
semanticscholar +1 more source
PURPOSE To comparatively investigate the clinical outcomes, vector parameters, and corneal aberrations of small incision lenticule extraction (SMILE) with a triple centration technique and corneal wavefront-guided transepithelial photorefractive ...
I. Jun +6 more
semanticscholar +1 more source
The components of adult astigmatism and their age‐related changes
Ophthalmic & physiological optics, 2019To study the corneal and internal astigmatism and the age‐related changes underlying the known refractive shift with‐the‐rule (WTR) towards against‐the‐rule (ATR) astigmatism.
J. Rozema, Sarah Hershko, M. Tassignon
semanticscholar +1 more source