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higher-order aberrations

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https://www.readbyqxmd.com/read/29040117/factors-limiting-the-visual-outcome-after-descemet-stripping-automated-endothelial-keratoplasty-comprehensive-analysis-including-the-graft-position-and-irregularity
#1
Yasuaki Iwama, Takeshi Soma, Naoyuki Maeda, Yuzuru Sasamoto, Yoshinori Oie, Shizuka Koh, Kohji Nishida
PURPOSE: To investigate factors affecting best postoperative corrected distance visual acuity (CDVA) in patients who have undergone Descemet stripping automated endothelial keratoplasty (DSAEK). METHODS: Forty-two eyes of 42 patients with predominantly non-Fuchs endothelial corneal dystrophy after DSAEK were retrospectively evaluated. All patients were examined using anterior segment optical coherence tomography when their best postoperative CDVA had been achieved...
October 13, 2017: Cornea
https://www.readbyqxmd.com/read/29035922/effect-of-scattering-and-aberrations-on-visual-acuity-for-band-keratopathy
#2
Kazutaka Kamiya, Hidenaga Kobashi, Masahide Takahashi, Nobuyuki Shoji, Kimiya Shimizu
SIGNIFICANCE: The progressive accumulation of the calcification may deteriorate corneal transparency, especially in the interpalpebral area, and subsequent visual performance for patients with band keratopathy. However, the detailed quantitative analysis of light scattering or higher-order aberrations on visual performance for these patients so far has not been elucidated. PURPOSE: The aim of this study was to assess the relationship of intraocular forward scattering, corneal backward scattering, and corneal higher-order aberrations with visual acuity in eyes with band keratopathy...
October 13, 2017: Optometry and Vision Science: Official Publication of the American Academy of Optometry
https://www.readbyqxmd.com/read/29027083/objective-and-subjective-results-following-implantation-of-the-finevision-trifocal-intraocular-lens-in-mexican-patients
#3
Ivo Ferreira-Ríos, Karla Zuñiga-Posselt, Juan Carlos Serna-Ojeda, Eduardo Chávez-Mondragón
PURPOSE: To evaluate objective and subjective results after bilateral implantation of a diffractive trifocal intraocular lens (IOL) in a Mexican population. METHODS: Prospective, interventional case series involved 15 cataract surgery patients who underwent bilateral implantation of the trifocal Micro F lens FineVision IOL (PhysIOL, Liège, Belgium). Objective analysis involved assessment of monocular uncorrected distance (UDVA), near (UNVA) at 30 and 40 cm, and intermediate visual acuity (UIVA) at 50, 60, and 70 cm, preoperatively, and at postoperative months 1, 3, and 6...
October 12, 2017: International Ophthalmology
https://www.readbyqxmd.com/read/29016407/a-novel-entity-of-corneal-diseases-with-irregular-posterior-corneal-surfaces-concept-and-clinical-relevance
#4
Takefumi Yamaguchi, Eisuke Shimizu, Yukari Yagi-Yaguchi, Daisuke Tomida, Yoshiyuki Satake, Jun Shimazaki
Various corneal diseases, such as hereditary corneal dystrophies, corneal infection, and bullous keratopathy, cause corneal opacity, scarring, and edema, leading to severely decreased visual acuity and loss of vision. These diseases were regarded as corneal opacity diseases, and the decreased visual acuity was considered to be predominantly caused by corneal opacity. The influence of corneal irregular astigmatism on vision has been poorly understood to date, mainly because accurate quantification of irregular astigmatism has been technically challenging...
November 2017: Cornea
https://www.readbyqxmd.com/read/28991338/age-related-changes-in-corneal-astigmatism
#5
Xu Shao, Kai-Jing Zhou, An-Peng Pan, Xue-Ying Cheng, He-Xie Cai, Jin-Hai Huang, A-Yong Yu
PURPOSE: To analyze the changes in corneal astigmatism as a function of age and develop a novel model to estimate corneal astigmatic change according to age. METHODS: This was a cross-sectional study of right eyes of 3,769 individuals. Total corneal astigmatism, keratometric astigmatism, anterior corneal astigmatism, and posterior corneal astigmatism were measured by a Scheimpflug tomographer. Smoothing fitting curves of polar values of corneal astigmatism as a function of age were drawn and average changes in corneal astigmatism at different ages were calculated...
October 1, 2017: Journal of Refractive Surgery
https://www.readbyqxmd.com/read/28953672/comparison-of-the-efficacy-between-topical-diquafosol-and-artificial-tears-in-the-treatment-of-dry-eye-following-cataract-surgery-a-meta-analysis-of-randomized-controlled-trials
#6
REVIEW
Xinyu Zhao, Song Xia, Youxin Chen
BACKGROUND: The prevalence of dry eye following cataract surgery was reported as high as 55.7%, this acute and iatrogenic disorder urgently required appropriate clinical management. The purpose of this study is to compare the efficacy of diquafosol sodium ophthalmic solution (DQS) and conventional artificial tears (AT) for the treatment of dry eye following cataract surgery. METHODS: The PubMed, Embase, and the Cochrane Central Register of Controlled Trials were searched from their earliest entries through June 2017 to obtain the studies, which evaluated the efficacy of DQS for patients with dry eye after cataract surgery...
September 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28945358/lysines-in-the-rna-polymerase-ii-c-terminal-domain-contribute-to-taf15-fibril-recruitment
#7
Abigail M Janke, Da Hee Seo, Vahid Rahmanian, Alexander E Conicella, Kaylee L Mathews, Kathleen A Burke, Jeetain Mittal, Nicolas L Fawzi
Many cancer-causing chromosomal translocations result in transactivating protein products encoding FET family (FUS, EWSR1, TAF15) low-complexity (LC) domains fused to a DNA binding domain from one of several transcription factors. Recent work demonstrates that higher-order assemblies of FET LC domains bind the carboxy-terminal domain of the large subunit of RNA polymerase II (RNA pol II CTD), suggesting FET oncoproteins may mediate aberrant transcriptional activation by recruiting RNA polymerase II to promoters of target genes...
October 11, 2017: Biochemistry
https://www.readbyqxmd.com/read/28944205/clinical-outcomes-of-small-incision-lenticule-extraction-versus-femtosecond-laser-assisted-lasik-for-myopia-a-meta-analysis
#8
Huan Yan, Li-Yan Gong, Wei Huang, Yan-Li Peng
AIM: To evaluate the possible differences in visual quality between small incision lenticule extraction (SMILE) and femtosecond laser in situ keratomileusis (FS-LASIK) for myopia. METHODS: A Meta-analysis was performed. Patients were from previously reported comparative studies treated with SMILE versus FS-LASIK. The PubMed, EMBASE, Cochrane, Web of Science and Chinese databases (i.e. WANFANG and CNKI) were searched in Nov. of 2016 using RevMan 5.1 version software...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28944201/effects-of-higher-order-aberrations-on-contrast-sensitivity-in-normal-eyes-of-a-large-myopic-population
#9
Peng-Fei Zhao, Shi-Ming Li, Jing Lu, Hong-Min Song, Jing Zhang, Yue-Hua Zhou, Ning-Li Wang
AIM: To study the relation between higher-order aberrations (HOAs) and contrast sensitivity (CS) in normal eyes among a population of laser in situ keratomileusis (LASIK) candidates. METHODS: In 6629 eyes of 3315 LASIK candidates, CS were measured under dark environment at the spatial frequencies of 1.5, 3, 6, 12 and 18 cycles per degree (c/d), respectively, using an Optec 6500 visual function tester. Meanwhile, ocular HOAs were measured for a 6.0 mm pupil with a Hartmann-Shack wavefront analyzer...
2017: International Journal of Ophthalmology
https://www.readbyqxmd.com/read/28943388/corneal-higher-order-aberrations-and-visual-improvement-following-corneal-transplantation-in-treating-herpes-simplex-keratitis
#10
Eisuke Shimizu, Takefumi Yamaguchi, Daisuke Tomida, Yukari Yagi-Yaguchi, Yoshiyuki Satake, Kazuo Tsubota, Jun Shimazaki
PURPOSE: To examine corneal higher-order aberrations (HOAs) and visual improvement following corneal transplantation in treating corneal scar caused by herpes simplex keratitis (HSK). DESIGN: Retrospective consecutive case series. METHODS: This study included a total of 52 eyes: 18 normal subjects, and 34 eyes of consecutive patients with corneal scar due to HSK who underwent penetrating keratoplasty (PKP, 17 eyes) or deep anterior lamellar keratoplasty (DALK, 17 eyes)...
September 21, 2017: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28937417/age-related-changes-in-ocular-aberrations-and-the-yamagata-study-funagata
#11
Hiroyuki Namba, Ryo Kawasaki, Akira Sugano, Takanori Murakami, Koichi Nishitsuka, Takeo Kato, Takamasa Kayama, Hidetoshi Yamashita
Human vision quality is influenced by ocular aberrations, including astigmatism and higher-order aberrations (HOAs), in combination with other optical factors. In this study, we introduce the results and perceptions of previous studies investigating these aberrations. We also introduce our results obtained as part of the Yamagata Study (Funagata), a population-based epidemiologic study. To investigate the astigmatic change with age, researchers have used the power vector analysis, allowing incorporation of the magnitude and axis of astigmatism into statistical analyses...
November 2017: Cornea
https://www.readbyqxmd.com/read/28937416/a-novel-entity-of-corneal-diseases-with-irregular-posterior-corneal-surface-concept-and-clinical-relevance
#12
Takefumi Yamaguchi, Eisuke Shimizu, Yukari Yagi-Yaguchi, Daisuke Tomida, Yoshiyuki Satake, Jun Shimazaki
Various corneal diseases, such as hereditary corneal dystrophies, corneal infection, and bullous keratopathy, cause corneal opacity, scarring, and edema, leading to severely decreased visual acuity and loss of vision. These diseases were regarded as corneal opacity diseases, and the decreased visual acuity was considered to be predominantly caused by corneal opacity. The influence of corneal irregular astigmatism on vision has been poorly understood to date, mainly because accurate quantification of irregular astigmatism has been technically challenging...
September 19, 2017: Cornea
https://www.readbyqxmd.com/read/28936921/osteopontin-c-isoform-levels-are-associated-with-sr-and-hnrnp-differential-expression-in-ovarian-cancer-cell-lines
#13
Durval Santos Marques, Jessica Grativol, Rodrigo Alves da Silva Peres, Aline da Rocha Matos, Etel Rodrigues Pereira Gimba
Osteopontin-c splicing isoform activates ovarian cancer progression features. Imbalanced expression of splicing factors from serine/arginine -rich and heterogeneous ribonucleoproteins families has been correlated with the generation of oncogenic splicing isoforms. Our goal was to investigate whether there is any association between the transcriptional patterns of these splicing factors in ovarian cells and osteopontin-c expression levels. We also aimed to investigate the occurrence of these splicing factors binding sites inside osteopontin exon 4 and adjacent introns...
September 2017: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
https://www.readbyqxmd.com/read/28932660/atomic-scale-study-of-cation-ordering-in-potassium-tungsten-bronze-nanosheets
#14
Luying Li, Fan Jiang, Fanfan Tu, Shuangfeng Jia, Yihua Gao, Jianbo Wang
It has long been accepted that the formation of superlattices in hexagonal-based potassium tungsten bronzes is attributed to K vacancies only, together with small displacements of W cations. Here, the superlattices within potassium tungsten bronze nanosheets both structurally and spectroscopically at atomic resolution using comprehensive transmission electron microscopy techniques are studied. The multidimensional chemical analyses are realized by energy-dispersive X-ray spectroscopy, electron energy-loss spectroscopy, and X-ray photoelectron spectroscopy, the atomic-scale structures are characterized using aberration-corrected scanning transmission electron microscopy with high-angle annular-dark-field detector...
September 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28932340/contact-lenses-for-keratoconus-current-practice
#15
Marilita M Moschos, Eirini Nitoda, Panagiotis Georgoudis, Miltos Balidis, Eleftherios Karageorgiadis, Nikos Kozeis
BACKGROUND: Keratoconus is a chronic, bilateral, usuallly asymmetrical, non-inflammatory, ectatic disorder, being characterized by progressive steepening, thinning and apical scarring of the cornea. Initially, the patient is asymptomatic, but the visual acuity gradually decreases, resulting in significant vision loss due to the development of irregular astigmatism, myopia, corneal thinning and scarring. The classic treatment of visual rehabilitation in keratoconus is based on spectacles and contact lenses (CLs)...
2017: Open Ophthalmology Journal
https://www.readbyqxmd.com/read/28928983/influences-of-27-gauge-vitrectomy-on-corneal-topographic-conditions
#16
Takafumi Hirashima, Takao Utsumi, Miou Hirose, Hideyasu Oh
PURPOSE: To evaluate the influences of 27-gauge vitrectomy on corneal topographic conditions. METHOD: Fifty-six eyes of 56 patients undergoing 27-gauge vitrectomy were retrospectively studied. Twenty-three eyes with epiretinal membrane (ERM), 23 eyes with macular hole (MH), and 10 eyes with proliferative diabetic retinopathy (PDR) were included. Forty-five of the 56 eyes underwent 27-gauge phacovitrectomy (group 1), and the remaining 11 eyes underwent 27-gauge vitrectomy alone (group 2)...
2017: Journal of Ophthalmology
https://www.readbyqxmd.com/read/28922329/conventional-corneal-collagen-cross-linking-versus-transepithelial-diluted-alcohol-and-iontophoresis-assisted-corneal-cross-linking-in-progressive-keratoconus
#17
Kamil Bilgihan, Nilufer Yesilirmak, Yesim Altay, Armagan Yuvarlak, Huseyin Baran Ozdemir
PURPOSE: To compare clinical outcomes of conventional corneal cross-linking (C-CXL) and diluted alcohol and iontophoresis-assisted corneal cross-linking (DAI-CXL) for the treatment of progressive keratoconus (KC). METHODS: Ninety-three eyes of 80 patients with KC were treated by C-CXL (n = 47) or DAI-CXL (n = 46). Visual acuity, keratometry, KC indexes, pachymetry, and aberrations were recorded before treatment and 1, 3, 6, and 12 months after treatment. The demarcation line was assessed 1 month after treatment...
September 14, 2017: Cornea
https://www.readbyqxmd.com/read/28917399/variability-in-angle-%C3%AE%C2%BA-and-its-influence-on%C3%A2-higher-order-aberrations-in%C3%A2-pseudophakic-eyes
#18
Annette Harrer, Nino Hirnschall, Juan Tabernero, Pablo Artal, Petra Draschl, Sophie Maedel, Oliver Findl
PURPOSE: To observe the variability in angle κ in pseudophakic patients and assess its correlation with optical biometry measurements and higher-order aberrations (HOAs). SETTING: Hanusch Hospital, Vienna, Austria. DESIGN: Prospective case series. METHODS: This study included patients who had cataract surgery 3 months to 1 year before study recruitment. In all cases, Purkinje meter images were taken. In addition, partial coherence interferometry measurement (IOLMaster) of the axial intraocular lens (IOL) position was performed...
August 2017: Journal of Cataract and Refractive Surgery
https://www.readbyqxmd.com/read/28914632/stepwise-guided-photorefractive-keratectomy-in-treatment-of-irregular-astigmatism-after-penetrating-keratoplasty-and-deep-anterior-lamellar-keratoplasty
#19
Nir Sorkin, Adi Einan-Lifshitz, Sagi Abelson, Tanguy Boutin, Mahmood Showail, Armand Borovik, Zach Ashkenazy, Clara C Chan, David S Rootman
PURPOSE: To report the outcome of stepwise ablation using topography-guided photorefractive keratectomy to treat irregular astigmatism after either penetrating keratoplasty (PKP) or deep anterior lamellar keratoplasty (DALK). METHODS: This is a retrospective, interventional analysis including patients with irregular astigmatism after either PKP or DALK, who underwent topography-guided photorefractive keratectomy. The entire cohort was analyzed, as well as the PKP and DALK groups separately...
September 12, 2017: Cornea
https://www.readbyqxmd.com/read/28914393/costunolide-induces-micronuclei-formation-chromosomal-aberrations-cytostasis-and-mitochondrial-mediated-apoptosis-in-chinese-hamster-ovary-cells
#20
Soma Shiva Nageswara Rao Singireesu, Sunil Misra, Sujan Kumar Mondal, Suresh Yerramsetty, Nivedita Sahu, Suresh Babu K
Costunolide (CE) is a sesquiterpene lactone well-known for its antihepatotoxic, antiulcer, and anticancer activities. The present study focused on the evaluation of the cytogenetic toxicity and cellular death-inducing potential of CE in CHO cells, an epithelial cell line derived from normal ovary cells of Chinese hamster. The cytotoxic effect denoting MTT assay has shown an IC50 value of 7.56 μM CE, where 50% proliferation inhibition occurs. The oxidative stress caused by CE was confirmed based on GSH depletion induced cell death, conspicuously absent in N-acetylcysteine (GSH precursor) pretreated cells...
September 15, 2017: Cell Biology and Toxicology
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