Results 71 to 80 of about 78,366 (184)

Effect of Anterior Corneal Surface Asphericity Modification on Fourth-Order Zernike Spherical Aberrations

open access: yes, 2014
International audiencePURPOSE To evaluate the theoretical influence of the change in corneal asphericity (Delta Q) on the change in fourth-order Zernike spherical aberration coefficient (Delta C-0(4)) with customized aspheric refractive correction of ...
Malet, Jacques   +7 more
core   +1 more source

Effect of sodium fluorescein strip application on cornea parameters commonly used in laser-assisted in-situ keratomileusis

open access: yesScientific Reports, 2023
To assess the effect of sodium fluorescein (NaF) strip on corneal parameters commonly used in Laser-assisted in-situ keratomileusis (LASIK). Eighty-six subjects (172 eyes) scheduled for LASIK were recruited between January and March 2022.
Dongmei Han   +5 more
doaj   +1 more source

Relationship Between Optic Nerve Head Area and Peripapillary Retinal Nerve Fiber Layer Thickness in Laboratory Beagles

open access: yesVeterinary Ophthalmology, Volume 29, Issue 1, January 2026.
ABSTRACT Objective To determine if the area of the canine optic nerve head (ONH) is related to the peripapillary retinal nerve fiber layer (RNFL) thickness. Animals Studied A total of 44 eyes of 22 adult normal laboratory Beagles. Procedures In this retrospective study, confocal scanning laser ophthalmoscopy (cSLO) and spectral domain optical coherence
Colleen E. Dwyer   +6 more
wiley   +1 more source

Retinal Peripheral Defocus and Peripheral Refractive Measurement Techniques: A Review

open access: yesJournal of Ophthalmology, Volume 2026, Issue 1, 2026.
The theory of retinal peripheral defocus currently represents the prevailing paradigm for myopia prevention and control. Research studies on peripheral refraction indicate that peripheral defocus is significantly associated with the management and progression of myopia.
Lei Chang, Tao Jin, Karuna Sharma
wiley   +1 more source

Corneal Shape in Hyperopia [PDF]

open access: yes, 1998
Background: A trend towards decreased peripheral corneal flattening with increasing myopia has recently been demonstrated. The present study was conducted to determine whether corneal asphericity also varies significantly with hyperopic refractive error.\
Carney, Leo G.   +5 more
core  

Analysis of corneal asphericity (Q value) and its related factors in adult Egyptians: a cross-sectional study

open access: yesDelta Journal of Ophthalmology, 2020
Purpose The aim of this study was to determine the corneal Q value and its related factors in adult Egyptians and to compare the Q value of Egyptians with other ethnic groups. Design This was a cross-sectional study.
Mohamed R Elsayed   +4 more
doaj   +1 more source

One‐Year Outcomes of Topography‐Guided LASIK for Myopia and Astigmatism

open access: yesJournal of Ophthalmology, Volume 2026, Issue 1, 2026.
Introduction To assess the efficacy and safety of topography‐guided LASIK (TG‐LASIK) in correcting myopia and astigmatism and to evaluate clinical outcomes and visual quality postoperatively. Methods We conducted a prospective study including patients aged 18–40 years with stable refraction for over 12 months.
Shanshan Wei   +8 more
wiley   +1 more source

The relationship between the sagitta of the anterior corneal surface and refractive error of the eye

open access: yes, 2004
Changes in the sagitta of the anterior corneal surface associated with a change in the corneal radius of curvature have been used to calculate the change in refractive error of the eye in two areas: the ablation depth for laser surgery, and the change in
Garner, Leon F., Owens, Helen
core   +1 more source

Oligopeptide-mediated gene transfer into mouse corneal endothelial cells: Expression, design optimization, uptake mechanism and nuclear localization [PDF]

open access: yes, 2009
Copyright © The Author 2009. Published by Oxford University Press. This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses?by-nc/2.0/uk/) which permits ...
Seow, WY, George, AJT, Yang, Y-Y
core   +1 more source

Agreement of anterior segment parameters measured by Scheimpflug-based Scansys and Pentacam HR: A prospective, cross-sectional comparative study

open access: yesPhotodiagnosis and Photodynamic Therapy
Objective: This study aimed to systematically evaluate the repeatability, differences, and agreement between Scansys and Pentacam HR for measuring anterior segment parameters. Methods: This prospective consistency evaluation study evaluated 222 patients'
Yanfen Liao   +7 more
doaj   +1 more source

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