Results 41 to 50 of about 4,816 (194)

Contribution of Ocular Residual Astigmatism to Anterior Corneal Astigmatism in Children with Low and Moderate Myopia

open access: yes, 2021
Abstract To assess the contribution of ocular residual astigmatism (ORA) to anterior corneal astigmatism (ACA) in children with low and moderate myopia. Refractive astigmatism (RA) were received by subjective manifest refraction. ACA were obtained by IOL Master. Using Thibos vector analysis to calculate ORA.
Jian Lin   +4 more
openaire   +1 more source

Scatterplot showing the correlation of the ocular residual astigmatism (ORA) versus the tilted angle, decentration of the x-axis, the y-axis and the spatial distance of decentration. [PDF]

open access: yes, 2013
Scatterplot showing the correlation of the ocular residual astigmatism (ORA) versus the tilted angle, decentration of the x-axis, the y-axis and the spatial distance of decentration.
Xiaogang Wang (250803)   +3 more
core   +1 more source

Table_1_Characteristics of full compensation and its association with total astigmatism: A cross-sectional study.DOCX [PDF]

open access: yes, 2023
ObjectiveTo evaluate the characteristics of full compensation and its association with the prevalence of total astigmatism (TA), and to analyze the effects of TA on uncorrected distance visual acuity (UDVA).MethodsWith random cluster sampling based on a ...
Yi Liu (36759)   +11 more
core   +1 more source

Best-corrected visual acuity and astigmatism values of subjects. [PDF]

open access: yes, 2013
Note: BCVA  =  best-corrected visual acuity; ORA  =  ocular residual astigmatism; D  =  diopters; SD  =  standard deviation.
Xiaogang Wang (250803)   +3 more
core   +1 more source

Table_3_Characteristics of full compensation and its association with total astigmatism: A cross-sectional study.DOCX [PDF]

open access: yes, 2023
ObjectiveTo evaluate the characteristics of full compensation and its association with the prevalence of total astigmatism (TA), and to analyze the effects of TA on uncorrected distance visual acuity (UDVA).MethodsWith random cluster sampling based on a ...
Yi Liu (36759)   +11 more
core   +1 more source

Management of irregular astigmatism [PDF]

open access: yes, 2000
Using a liberal definition of corneal irregularity, modern videokeratoscopy may define approximately 40% of normal corneas with a toric refractive error as possessing primary irregular astigmatism.
Goggin, M., Alpins, N., Schmid, L.
core   +1 more source

Comparison of the predictability of refractive cylinder correction by laser in situ keratomileusis in eyes with low or high ocular residual astigmatism [PDF]

open access: yes, 2015
Purpose: To compare the manifest refractive cylinder (MRC) predictability of myopic astigmatism laser in situ keratomileusis (LASIK) between eyes with low and high ocular residual astigmatism (ORA).
Gobbe, Marine   +4 more
core   +1 more source

Anatomical and functional outcomes of toric intraocular lens implantation

open access: yesJournal of Marine Medical Society, 2019
Background: To minimize the residual refractive correction, toric intraocular lens (TIOL) is being increasingly used in cases undergoing cataract surgery with preexisting corneal astigmatism of ≥1.0 D.
Dubbaka Srujana   +5 more
doaj   +1 more source

Changes in Vector Astigmatism After Superotemporal Versus Temporal Clear Corneal Incision Cataract Surgery [PDF]

open access: yes, 2022
Purpose: To investigate vector and refractive astigmatism changes after superotemporal versus temporal clear corneal incision cataract surgery. Methods: Patients were diagnosed with age-related cataract with corneal astigmatism < 1.5 diopters (D) and ...
Fan, Qi   +3 more
core  

Vector analysis of corneal and refractive astigmatism changes following toric pseudophakic and toric phakic intraocular lens implantation [PDF]

open access: yes, 2012
Purpose: To determine the efficacy of the astigmatism correction following toric intraocular lens (IOL) and toric phakic IOL (pIOL) implantation in eyes with no previous ocular surgery and post-keratoplasty (PKP) eyes.
Visser, N.   +4 more
core   +1 more source

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