Results 21 to 30 of about 42,051 (253)
Optics of astigmatism and retinal image quality [PDF]
, 2012 In the first part of this chapter, the optical condition of astigmatism is defined. The main causes and available classifications of ocular astigmatism are briefly described.
Arjona Carbonell, Mª Montserrat +5 more
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Factors associated with corneal astigmatism change after ptosis surgery [PDF]
International Journal of Ophthalmology, 2022 AIM: To evaluate the predictive factors of postoperative corneal astigmatism change in ptosis patients who underwent ptosis surgical repair. METHODS: Patients who underwent levator resection at Oculoplastic service of the Department of Ophthalmology ...
Natpatsorn Mongkolareepong +2 more
doaj +1 more source
The American Journal of the Medical Sciencesn ...
I.A. Loskutov, A.K. Tigranyan
openaire +3 more sources
Type of residual astigmatism and uncorrected visual acuity in pseudophakic eyes
Scientific Reports, 2022 It is difficult to assess the pure impact of the type of residual astigmatism (with-the-rule; WTR, against-the-rule; ATR, and oblique astigmatism) on uncorrected distance visual acuity (UDVA) in pseudophakic eyes due to different age distribution of ...
Yumi Hasegawa +3 more
doaj +1 more source
Visual acuity measures do not reliably detect childhood refractive error--an epidemiological study. [PDF]
, 2012 PURPOSE: To investigate the utility of uncorrected visual acuity measures in screening for refractive error in white school children aged 6-7-years and 12-13-years.
Nicola S Logan +19 more
core +2 more sources
The contribution of ocular residual astigmatism to anterior corneal astigmatism in refractive astigmatism eyes [PDF]
Scientific Reports, 2021 AbstractTo determine the distribution of ocular residual astigmatism (ORA) in astigmatic eyes and the influence on the anterior corneal (ACA) and refractive astigmatism (RA). A total of 165 children met the inclusion criteria. Right eyes’ data were analyzed. Using Thibos vector analysis to calculate ORA. Spearman correlation analysis was used to obtain
openaire +3 more sources
Prevalence of and factors associated with astigmatism in preschool children in Wuxi City, China
BMC Ophthalmology, 2022 Purpose To investigate the status of astigmatism in preschool children in Wuxi City, and explore the risk factors related to astigmatism. The risk factors related to astigmatism development as predictors can help us identify preschool children who need ...
Zhihui Yang +6 more
doaj +1 more source
Indian Journal of Ophthalmology, 2021 Purpose: The aim of this study was to evaluate the changes in astigmatism after unilateral recession of horizontal rectus muscles in pediatric patients.
Christina Karakosta +7 more
doaj +1 more source
Effect of femtosecond laser-assisted steepest-meridian clear corneal incisions on preexisting corneal regular astigmatism at the time of cataract surgery [PDF]
International Journal of Ophthalmology, 2020 AIM: To investigate the clinical efficacy and safety of femtosecond laser-assisted steepest-meridian clear corneal incisions for correcting preexisting corneal astigmatism performed at the time of cataract surgery.
Wei Chen +7 more
doaj +1 more source
, 2012 This book explores the development, optics and physiology of astigmatism and places this knowledge in the context of modern management of this aspect of refractive error.
core +1 more source