Titre : Électrons

Électrons : Questions médicales fréquentes

Termes MeSH sélectionnés :

Visual Acuity
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utilise des détecteurs de particules comme les chambres à bulles ou les compteurs Geiger." } }, { "@type": "Question", "name": "Quels appareils mesurent les électrons ?", "position": 2, "acceptedAnswer": { "@type": "Answer", "text": "Les spectromètres de masse et les microscopes électroniques mesurent les électrons." } }, { "@type": "Question", "name": "Peut-on visualiser les électrons ?", "position": 3, "acceptedAnswer": { "@type": "Answer", "text": "Oui, via des techniques comme la microscopie électronique à transmission." } }, { "@type": "Question", "name": "Quel rôle jouent les électrons dans les réactions chimiques ?", "position": 4, "acceptedAnswer": { "@type": "Answer", "text": "Les électrons participent aux liaisons chimiques et aux transferts d'énergie." } }, { "@type": "Question", "name": "Comment les électrons affectent-ils la conductivité ?", "position": 5, "acceptedAnswer": { "@type": "Answer", "text": "Les électrons libres dans un matériau déterminent sa conductivité électrique." } }, { "@type": "Question", "name": "Quels symptômes sont liés à une exposition excessive aux électrons ?", "position": 6, "acceptedAnswer": { "@type": "Answer", "text": "Une exposition excessive peut causer des brûlures cutanées ou des lésions tissulaires." } }, { "@type": "Question", "name": "Comment l'exposition aux électrons affecte-t-elle la santé ?", "position": 7, "acceptedAnswer": { "@type": "Answer", "text": "Elle peut entraîner des effets biologiques comme des mutations cellulaires." } }, { "@type": "Question", "name": "Quels signes indiquent une surdose d'électrons ?", "position": 8, "acceptedAnswer": { "@type": "Answer", "text": "Des symptômes comme des nausées ou des vertiges peuvent survenir." } }, { "@type": "Question", "name": "Les électrons peuvent-ils causer des maladies ?", "position": 9, "acceptedAnswer": { "@type": "Answer", "text": "Oui, une exposition prolongée peut augmenter le risque de cancers." } }, { "@type": "Question", "name": "Quels effets à long terme l'exposition aux électrons peut-elle avoir ?", "position": 10, "acceptedAnswer": { "@type": "Answer", "text": "Des effets à long terme incluent des troubles neurologiques ou des cancers." } }, { "@type": "Question", "name": "Comment prévenir l'exposition aux électrons ?", "position": 11, "acceptedAnswer": { "@type": "Answer", "text": "Utiliser des équipements de protection et respecter les normes de sécurité." } }, { "@type": "Question", "name": "Quelles mesures de sécurité en laboratoire sont nécessaires ?", "position": 12, "acceptedAnswer": { "@type": "Answer", "text": "Porter des gants, des lunettes de protection et travailler sous hotte." } }, { "@type": "Question", "name": "Comment réduire les risques d'exposition aux radiations ?", "position": 13, "acceptedAnswer": { "@type": "Answer", "text": "Limiter le temps d'exposition et augmenter la distance des sources de radiation." } }, { "@type": "Question", "name": "Quels équipements protègent contre les électrons ?", "position": 14, "acceptedAnswer": { "@type": "Answer", "text": "Des écrans en plomb ou des barrières de protection sont efficaces." } }, { "@type": "Question", "name": "Comment sensibiliser aux dangers des électrons ?", "position": 15, "acceptedAnswer": { "@type": "Answer", "text": "Organiser des formations et des campagnes d'information sur les risques." } }, { "@type": "Question", "name": "Comment traiter les brûlures causées par les électrons ?", "position": 16, "acceptedAnswer": { "@type": "Answer", "text": "Les brûlures doivent être nettoyées et couvertes, et des analgésiques peuvent être prescrits." } }, { "@type": "Question", "name": "Y a-t-il des antidotes pour l'exposition aux électrons ?", "position": 17, "acceptedAnswer": { "@type": "Answer", "text": "Il n'existe pas d'antidote spécifique, mais un traitement symptomatique est recommandé." } }, { "@type": "Question", "name": "Comment gérer les effets des radiations sur la santé ?", "position": 18, "acceptedAnswer": { "@type": "Answer", "text": "La gestion inclut des soins médicaux, des suivis réguliers et des traitements ciblés." } }, { "@type": "Question", "name": "Quels traitements sont disponibles pour les cancers liés aux électrons ?", "position": 19, "acceptedAnswer": { "@type": "Answer", "text": "Les traitements incluent la chimiothérapie, la radiothérapie et la chirurgie." } }, { "@type": "Question", "name": "Comment traiter les mutations cellulaires causées par les électrons ?", "position": 20, "acceptedAnswer": { "@type": "Answer", "text": "Le traitement dépend du type de mutation, souvent par des thérapies ciblées." } }, { "@type": "Question", "name": "Quelles complications peuvent survenir après une exposition ?", "position": 21, "acceptedAnswer": { "@type": "Answer", "text": "Des complications comme des cancers ou des troubles génétiques peuvent survenir." } }, { "@type": "Question", "name": "Les électrons peuvent-ils causer des maladies chroniques ?", "position": 22, "acceptedAnswer": { "@type": "Answer", "text": "Oui, l'exposition prolongée peut entraîner des maladies chroniques comme des cancers." } }, { "@type": "Question", "name": "Quels effets secondaires sont liés aux traitements des électrons ?", "position": 23, "acceptedAnswer": { "@type": "Answer", "text": "Les effets secondaires incluent la fatigue, des nausées et des troubles sanguins." } }, { "@type": "Question", "name": "Comment les électrons affectent-ils le système immunitaire ?", "position": 24, "acceptedAnswer": { "@type": "Answer", "text": "Une exposition excessive peut affaiblir le système immunitaire, augmentant les infections." } }, { "@type": "Question", "name": "Quelles sont les conséquences d'une exposition aiguë ?", "position": 25, "acceptedAnswer": { "@type": "Answer", "text": "Une exposition aiguë peut entraîner des brûlures, des lésions tissulaires et des douleurs." } }, { "@type": "Question", "name": "Quels sont les facteurs de risque d'exposition aux électrons ?", "position": 26, "acceptedAnswer": { "@type": "Answer", "text": "Les travailleurs en laboratoire, les radiologues et les techniciens sont à risque." } }, { "@type": "Question", "name": "Comment l'environnement influence-t-il l'exposition aux électrons ?", "position": 27, "acceptedAnswer": { "@type": "Answer", "text": "Des environnements industriels ou médicaux peuvent augmenter l'exposition aux électrons." } }, { "@type": "Question", "name": "Les enfants sont-ils plus à risque d'exposition ?", "position": 28, "acceptedAnswer": { "@type": "Answer", "text": "Oui, les enfants sont plus sensibles aux effets des radiations et des électrons." } }, { "@type": "Question", "name": "Quels comportements augmentent le risque d'exposition ?", "position": 29, "acceptedAnswer": { "@type": "Answer", "text": "Des comportements comme le non-port de protections augmentent le risque d'exposition." } }, { "@type": "Question", "name": "Comment les antécédents médicaux influencent-ils le risque ?", "position": 30, "acceptedAnswer": { "@type": "Answer", "text": "Des antécédents de maladies peuvent augmenter la vulnérabilité aux effets des électrons." } } ] } ] }

Sources (10000 au total)

Binocular summation of visual acuity and contrast sensitivity in children with intermittent exotropia.

To investigate the binocular summation (BiS) of visual acuity (VA) and contrast sensitivity (CS) in children with intermittent exotropia (IXT) before and after surgery and to probe the relationship be... This prospective study included 21 IXT children (11 males and 10 females; aged 6-13 years) who underwent strabismus surgery in Tianjin Eye Hospital from January to April 2022. The visual function was ... All patients had postoperative deviation ranging from 0 to -4 PD. Either preoperative or postoperative BVA at 2.5% contrast was superior to the MVA. The postoperative BiS at 2.5% contrast was signific... BVA at low contrast and BCS examinations were not equivalent to stereopsis and fusion status, which contributed to the evaluation of binocular function in the real environment and in the different asp...

Binocular Summation of Visual Acuity at High and Low Contrast in Early Glaucoma.

This study examined the integrity of binocular summation function in patients with mild glaucoma. We found that binocular summation of visual acuity is preserved in these patients, despite their reduc... Binocular summation represents superiority of binocular to monocular performance. In this study we examined the integrity of binocular summation function in patients with early glaucoma who had struct... Participants included 48 patients with early glaucoma according to Hodapp, Anderson, and Parrish 2 (HAP2) criteria (age 65±12 y) and 42 healthy controls (age 60±12 y), matched for stereoacuity. Visual... Overall, binocular and monocular visual acuity of the control group was better than that of the glaucoma group for both contrast levels, P =0.001. For the glaucoma group, there was a significant diffe... For patients with early glaucoma, binocular summation function for visual acuity was preserved at both contrast levels. This suggests an adaptation of the visual system in early stages of glaucoma tha...

Predicting postoperative visual acuity in epiretinal membrane patients and visualization of the contribution of explanatory variables in a machine learning model.

The purpose of this study was to develop a model that can predict the postoperative visual acuity in eyes that had undergone vitrectomy for an epiretinal membrane (ERM). The Light Gradient Boosting Ma... The RMSEs for the predicted visual acuity of Model 1 were 0.14 ± 0.02 logMAR units at 1 month, 0.12 ± 0.03 logMAR units at 3 months, and 0.13 ± 0.04 logMAR units at 6 months. High SHAP values were obs... Predicting the postoperative visual acuity in ERM patients is possible using the preoperative clinical data and OCT images with LightGBM. The contribution of the explanatory variables can be visualize...

Macular exudate in idiopathic intracranial hypertension affects outer retina and visual acuity.

Optical coherence tomography (OCT) is suggested as a potential tool for retinal biomarkers in idiopathic intracranial hypertension (IIH). We explored how macular exudate (ME) affects retinal structure... Patients diagnosed with IIH and matched controls were enrolled. ME detection was done on fundus photography; swept-source OCT was used to image and measure the retinal sublayer thicknesses, including ... 195 eyes from 98 IIH patients (42 eyes had ME) and 224 eyes from 112 controls were included. IIH patients had thicker INL and ORL compared with controls (both p<0.001) while IIH eyes with ME had thick... ME affects retinal thickness in IIH patients and is associated with more severe clinical features in IIH. OCT may provide biomarkers informative of clinical changes in IIH. Further longitudinal studie...

The influence of refractive state and heterophorias on visual acuity and stereoacuity in healthy young adults.

To evaluate associations of refractive error and heterophoria with best-corrected visual acuity and stereoacuity in a population of healthy young adults.... Data extracted from the Israeli Defense Forces Air Force candidates database was analyzed retrospectively. Myopia and hyperopia were defined as spherical equivalent of ≤ -0.50 D and ≥ +0.50 D. Cylinde... The study population included 5,491 subjects (75.8% male), with a mean age of 17.6 ± 0.9 years: 2,355 (42.9%) had myopia, 640 (11.6%) had hyperopia, and the rest were emmetropic. Astigmatism was prese... Emmetropia is associated with better best-corrected visual acuity and stereoacuity. Astigmatism and high hyperopia are correlated with poorer best-corrected visual acuity. Exophoria does not interfere...

The Impact of Early Photoscreening on Medium-term Visual Acuity: A Population-Based Study.

To analyze the outcomes of an early ophthalmological intervention in children included in the pilot project of the "Rastreio de Saúde Visual Infantil" (RSVI) visual screening program in Portugal.... This was a retrospective analysis of the medical records of all children included in the RSVI from April 1, 2016 to December 31, 2016, and who were referred to an ophthalmology appointment. Data of re... Two hundred sixty-seven (18.2%) 2-year-old children from the Centro Hospitalar Universitário do Porto reference area had a positive screening result and were subsequently referred to an ophthalmology ... This study demonstrates the effectiveness of an early intervention in the prevention and treatment of amblyopia, because after a median follow-up of 3 years after treatment none of the referred childr...

Association of Neighborhood Child Opportunity Index with presenting visual acuity in amblyopic children.

To demonstrate the use of a novel measure of neighborhood quality, the Child Opportunity Index (COI), for investigating health disparities in pediatric ophthalmology.... This study included children 2-12 years of age from a registry of patients diagnosed with amblyopia at an urban pediatric hospital between 2010 and 2014. Children previously treated for amblyopia were... This study included 1,050 amblyopic children, of whom 317 (37%) were non-White and 149 (19%) were Hispanic; 461 (44%) had public insurance. Regarding residence, 129 (12%) lived in areas of very low op... Amblyopic children residing in communities with low neighborhood opportunity had slightly worse visual acuity in the better-seeing eye at presentation. Although statistically significant in the better...