Results 281 to 290 of about 88,327 (313)
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Optometry and Vision Science, 1978
A large amount of evidence suggests that astigmatism is hereditary. Other evidence indicates that the prevalence of astigmatism varies widely between and within racial groups and that both the direction and the amount of astigmatism tend to vary as a function of age and in response to environmental influences.
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A large amount of evidence suggests that astigmatism is hereditary. Other evidence indicates that the prevalence of astigmatism varies widely between and within racial groups and that both the direction and the amount of astigmatism tend to vary as a function of age and in response to environmental influences.
openaire +3 more sources
A Longitudinal Study of Corneal Astigmatism and Total Astigmatism
Optometry and Vision Science, 1981Cross-sectional studies indicate that mean total astigmatism changes with age; varying from as much as 0.62 D with-the-rule during youth to as much as 0.37 D against-the-rule in samples of elderly patients. The present study involves the examination of adult patients who were seen regularly for a period of at least 40 years.
William R. Baldwin, David Mills
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Journal of refractive surgery, 2018
PURPOSE To evaluate the outcomes of transepithelial photorefractive keratectomy (PRK) in moderate to high astigmatism with a non-wavefront-guided aberration-neutral ablation profile using SmartPulse allocation.
D. de Ortueta +4 more
semanticscholar +1 more source
PURPOSE To evaluate the outcomes of transepithelial photorefractive keratectomy (PRK) in moderate to high astigmatism with a non-wavefront-guided aberration-neutral ablation profile using SmartPulse allocation.
D. de Ortueta +4 more
semanticscholar +1 more source
Optometry and Vision Science, 1989
Measurement of refraction in the principal meridians and off-axis meridians in both directions from the visual axis was undertaken. The extent of disagreement between the sine-squared law and the actual astigmatism of living astigmatic eyes was calculated. The corrected visual acuity correlates with the residual ametropia.
N M, Sergienko, G D, Aliev
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Measurement of refraction in the principal meridians and off-axis meridians in both directions from the visual axis was undertaken. The extent of disagreement between the sine-squared law and the actual astigmatism of living astigmatic eyes was calculated. The corrected visual acuity correlates with the residual ametropia.
N M, Sergienko, G D, Aliev
openaire +2 more sources
Journal of refractive surgery, 2017
PURPOSE To study the safety, efficacy, and outcomes of manual cyclotorsion compensation in small incision lenticule extraction (SMILE) for myopic astigmatism.
S. Ganesh, Sheetal Brar, Archana Pawar
semanticscholar +1 more source
PURPOSE To study the safety, efficacy, and outcomes of manual cyclotorsion compensation in small incision lenticule extraction (SMILE) for myopic astigmatism.
S. Ganesh, Sheetal Brar, Archana Pawar
semanticscholar +1 more source
Irregular Astigmatism After Radial and Astigmatic Keratotomy
American Journal of Ophthalmology, 1989Eleven eyes of six patients, who had been referred for management of irregular astigmatism after receiving crossed incisions for myopic astigmatism, had moderate to marked irregular corneal astigmatism with marked flattening in the meridians of intersecting incisions. All six patients had a decrease in best-corrected visual acuity with spectacles after
James J Salz +2 more
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Post Penetrating Keratoplasty Astigmatism.
Survey of ophthalmology, 2021Rashmi Deshmukh +6 more
semanticscholar +1 more source
Journal of refractive surgery, 2018
PURPOSE To evaluate factors associated with residual astigmatism after toric intraocular lens implantation based on data from an online toric intraocular lens (IOL) back-calculator.
R. Potvin +3 more
semanticscholar +1 more source
PURPOSE To evaluate factors associated with residual astigmatism after toric intraocular lens implantation based on data from an online toric intraocular lens (IOL) back-calculator.
R. Potvin +3 more
semanticscholar +1 more source
American Journal of Ophthalmology, 1933
This study includes the changes produced by corneal incisions, and keratoconus as well as those arising from changes in the shape of the cornea and the crystalline lens. Read before the section on Ophthalmology, Fourth Pan-American Medical Congress, Mar. 22, 1933.
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This study includes the changes produced by corneal incisions, and keratoconus as well as those arising from changes in the shape of the cornea and the crystalline lens. Read before the section on Ophthalmology, Fourth Pan-American Medical Congress, Mar. 22, 1933.
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Current Opinion in Ophthalmology, 2002
Although laser in situ keratomileusis (LASIK) enjoys a high success rate, postoperative residual or induced astigmatism may limit uncorrected visual acuity and cause starbursts and glare at night. Irregular astigmatism can also cause loss of best-corrected visual acuity, monocular diplopia, and ghosting of images.
openaire +2 more sources
Although laser in situ keratomileusis (LASIK) enjoys a high success rate, postoperative residual or induced astigmatism may limit uncorrected visual acuity and cause starbursts and glare at night. Irregular astigmatism can also cause loss of best-corrected visual acuity, monocular diplopia, and ghosting of images.
openaire +2 more sources