Results 31 to 40 of about 136,945 (289)

Corneal High-Order Aberrations and Backscatter in Fuchs' Endothelial Corneal Dystrophy [PDF]

Ophthalmology, 2015
Suboptimal visual acuity after endothelial keratoplasty has been attributed to increased anterior corneal high-order aberrations (HOAs). In this study, we determined anterior and posterior corneal HOAs over a range of severity of Fuchs' endothelial corneal dystrophy (FECD).Cross-sectional study.A total of 108 eyes (62 subjects) with a range of severity
Wacker, Katrin, McLaren, Jay W., Amin, Sejal R., Baratz, Keith H., Patel, Sanjay V.   +4 more
openaire   +3 more sources

Effect of biaxial versus coaxial microincision cataract surgery on optical quality of the cornea

Indian Journal of Ophthalmology, 2015
Context: Visual function is determined by a combination of the cornea, which has a larger effect and internal aberrations generated by the intraocular lens and those induced by the surgery. These corneal refractive changes are related to the location and
Tamer Fahmy Eliwa, Mahmoud A Elsamkary, Ismail Hamza   +2 more
doaj   +1 more source

Repeatability of Corneal Aberrations and Ocular Biometry Measurements Using the Pentacam® AXL: A Cross-sectional Study [PDF]

Journal of Clinical and Diagnostic Research
Introduction: Accurate assessment of ocular biometry and corneal aberrations for diagnosis and therapy is crucial in many clinical settings. Devices to improve the measurements of these parameters are constantly being developed.
Meznah S almutairi, Basal H altoaimi, Rania Fahmy, Shatha I Algowaifly, May S Alenazi   +4 more
doaj   +1 more source

Biomechanical properties of cornea and ocular aberrations in myopic eyes

Indian Journal of Ophthalmology
Purpose: To study the correlation of corneal topography, corneal biomechanical properties, and ocular aberrations with the magnitude of refractive error in myopic eyes.
Rebika Dhiman, Divya Singh, Murugesan Vanathi, Radhika Tandon, Karthikeyan Mahalingam   +4 more
doaj   +1 more source

Changes of high order aberrations after photorefractive keratectomy (PRK) and FemtoLASIK

Российский офтальмологический журнал, 2022
Purpose: a comparative study of corneal and total wavefront aberration changes after traditional PRK and FemtoLASIK.Material and methods. Corneal and total wavefront aberrations were studied on OPD-Scan III aberrometer (Nidek) in 63 patients (126 eyes ...
N. V. Khodzhabekyan, A. T. Khandzhyan, E. P. Tarutta, S. G. Harutyunyan, M. D. Sengaeva   +4 more
doaj   +1 more source

Change in corneal shape and corneal wave-front aberrations with accommodation

Journal of Vision, 2003
This study investigated the change in corneal curvature and corneal wave-front aberrations with accommodation. The corneal curvature of the right eyes of 12 young adults was measured using a corneal topography system, while subjects fixated far (4.0 m) and near (0.2 m) targets with their left eyes. Convergence was controlled.
Ji C, He, Jane, Gwiazda, Frank, Thorn, Richard, Held, Walter, Huang   +4 more
openaire   +2 more sources

The Role of Corneal Aberrations in the Development and Progression of Pseudophakic Myopia after Congenital Cataract Extraction in Infancy

Oftalʹmologiâ, 2023
Relevance. Many studies have shown a relationship between higher order aberrations and refractive errors in children without comorbidities, but these studies have not been conducted in children with pseudophakia. Purpose.
L. A. Katargina, A. S. Galkina, T. B. Kruglova, S. V. Milash   +3 more
doaj   +1 more source

Distribution of corneal spherical aberration in a Tanzanian population

PLOS ONE, 2019
To investigate the distribution of corneal spherical aberration (SA) in Tanzanian people of African descent, and to examine the correlation between corneal SA and ocular parameters.Cross-sectional population-based study.Residents aged 40 years and older in three villages in the Mkuranga district in Tanzania were enlisted as study participants.
Hiroki Asano, Takahiro Hiraoka, Yusuke Seki, Teppei Shibata, Hiromi Osada, Takanori Saruta, Natsuko Hatsusaka, Fukumi Fujikake, Yoshiaki Tabata, Cellina Mhina, Anna Sanyiwa, Tetsuro Oshika, Hiroshi Sasaki   +12 more
openaire   +4 more sources

The Role of Calcitonin Gene‐Related Peptide in High‐Altitude Headache: A Prospective Field Study

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective High‐altitude headache (HAH) is a common neurological condition associated with rapid ascent to high altitude. The pathophysiological mechanisms underlying HAH remain incompletely understood. Calcitonin gene‐related peptide (CGRP), a neuropeptide implicated in migraine pathophysiology, may play a key role in the pathophysiology of ...
Roman Schniepp, Ludwig Karrasch, Helena Breitenstein, Andreas Straube, Katharina Kamm   +4 more
wiley   +1 more source

The effect of pterygium on front and back corneal astigmatism and aberrations in natural-light and low-light conditions

BMC Ophthalmology
Background To investigate the effect of different sizes of pterygium on the front and back corneal topography, refractive changes and aberrations in natural-light and low-light conditions.
Weiwei Xu, Xia Li
doaj   +1 more source