Results 21 to 30 of about 736 (153)

بررسی و مقایسه مشخصات جبهه موج چشمی در بیماران دارای کراتوکونوس دو طرفه همراه با خطوط وگت یکطرفه [PDF]

open access: yesJournal of Paramedical Science and Rehabilitation, 2018
هدف: هدف از مطالعه حاضر، بررسی و مقایسه مشخصات جبهه موج چشمی در بیماران دارای کراتوکونوس دو طرفه همراه با خطوط وگت یکطرفه می باشد. روش بررسی: در این مطالعه آینده نگر مقطعی، 50 بیمار 20 تا 38 ساله مبتلا به کراتوکونوس دوطرفه همراه با خطوط وگت یکطرفه، وارد ...
هادی استادی مقدم   +5 more
doaj   +2 more sources

Correlation analysis between ocular surface parameters and corneal higher-order aberrations in dry eye disease: a cross-sectional study [PDF]

open access: yesBMC Ophthalmology
Purpose To investigate the association between ocular surface parameters and corneal higher-order aberrations (cHOAs) in dry eye disease (DED) populations. Methods This cross-sectional study included 164 DED patients.
Yanmei Fang   +10 more
doaj   +2 more sources

AMOC Weakening Controls δ18O but Not Rainfall in North China During Deglacial Abrupt Events

open access: yesGeophysical Research Letters
East Asian Summer Monsoon (EASM) varied at orbital and millennial timescales during the Last Deglaciation (∼20–11 ka). The uniform δ18O response in East China is often linked to EASM circulation that drives a precipitation dipole in North and South China
Yitao Liu   +4 more
doaj   +2 more sources

Efficacy of image-guided accurate limbal relaxing incisions for astigmatism correction during cataract surgery [PDF]

open access: yesAdvances in Ophthalmology Practice and Research
Purpose: To investigate the efficacy of image-guided accurate limbal relaxing incisions (LRIs) for astigmatism correction during cataract surgery.
Xiaoxin Hu   +7 more
doaj   +2 more sources

Higher-order aberrations and visual outcomes of a new refractive extended depth-of-focus intraocular lens with a target of slight myopia [PDF]

open access: yesScientific Reports
In this single-center retrospective study, we compared visual performance and optical quality between a new refractive extended depth-of-focus intraocular lens (EDoF IOL, Model ZEN00V, n = 44), with a slightly myopic target, and an enhanced monofocal IOL
Hyunjo Lee   +7 more
doaj   +2 more sources

TAKE THE RISK OR LOSE THE CHANCE! CASE REPORT [PDF]

open access: yesTrakia Journal of Sciences, 2021
The hallmark of keratoconus is central or paracentral stromal thinning, accompanied by apical protrusion and irregular astigmatism. Patients typically experience variable reductions in visual acuity, image distortion, and increased sensitivity to glare
G. Tsvetkova, Y. Zdravkov, A. Oscar
doaj   +1 more source

iTrace aberrometry - Identifying occult imperfections in the visual system

open access: yesKerala Journal of Ophthalmology, 2021
Visual acuity is the sum of qualitative and quantitative factors. A combination of both determines the final visual acuity. The quality of vision (QoV) can be easily assessed by documenting objectively the higher-order aberrations or by using subjective ...
Bharat Gurnani, Kirandeep Kaur
doaj   +1 more source

Comparison of visual performance with iTrace analyzer following femtosecond laser-assisted cataract surgery with bilateral implantation of two different trifocal intraocular lenses [PDF]

open access: yesInternational Journal of Ophthalmology, 2023
AIM: To compare the postoperative binocular visual performance with an iTrace analyzer following femtosecond laser-assisted cataract surgery (FLACS) combined with bilateral implantation of two different types of diffractive trifocal intraocular lenses ...
Rui-Hong Ju   +6 more
doaj   +1 more source

Comparison of preoperative angle kappa measurements in the eyes of cataract patients obtained from Pentacam Scheimpflug system, optical low-coherence reflectometry, and ray-tracing aberrometry

open access: yesBMC Ophthalmology, 2022
Background Angle kappa plays a vital role in the implantation of multifocal intraocular lens (MIOL). Large angle kappa is related to a higher risk of postoperative photic phenomena.
Miaomiao Qin   +13 more
doaj   +1 more source

Impact of tear optics on the repeatability of Pentacam AXL wave and iTrace in measuring anterior segment parameters and aberrations

open access: yesIndian Journal of Ophthalmology, 2022
Purpose: To assess impact of tear optics on repeatability of a Scheimpflug device with a Hartmann Shack aberrometer and a ray tracing aberrometer. Methods: One hundred healthy and 100 postrefractive surgery eyes underwent dry eye evaluation including ...
GairikKundu   +6 more
doaj   +1 more source

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