Comment évaluer la perception visuelle ?

Des tests de vision, comme l'optométrie, évaluent la perception visuelle.

Quels examens pour troubles de la perception ?

L'IRM et l'électrorétinogramme aident à diagnostiquer les troubles de la perception.

Quels signes indiquent un problème visuel ?

Des difficultés à voir, des illusions ou des distorsions visuelles peuvent indiquer un problème.

Quand consulter un spécialiste de la vue ?

Consultez un ophtalmologiste si vous ressentez des changements soudains de vision.

Quelles sont les causes de troubles visuels ?

Les causes incluent les maladies oculaires, les traumatismes et les troubles neurologiques.

Quels symptômes de troubles de la perception ?

Les symptômes incluent la vision floue, les halos, et les difficultés de profondeur.

Comment reconnaître une illusion visuelle ?

Les illusions visuelles se manifestent par des perceptions erronées d'objets ou de couleurs.

Qu'est-ce que l'agnosie visuelle ?

L'agnosie visuelle est l'incapacité de reconnaître des objets malgré une vision intacte.

Quels signes d'une fatigue visuelle ?

Les signes incluent des maux de tête, des yeux secs et une vision floue après un usage prolongé.

Comment se manifeste la synesthésie visuelle ?

La synesthésie visuelle se manifeste par des associations involontaires entre couleurs et sons.

Comment prévenir les troubles de la perception ?

Protégez vos yeux avec des lunettes de soleil et faites des examens réguliers.

Quel rôle joue l'alimentation sur la vision ?

Une alimentation riche en vitamines A, C et E peut aider à maintenir une bonne vision.

Comment réduire la fatigue visuelle ?

Faites des pauses régulières lors de l'utilisation d'écrans pour réduire la fatigue visuelle.

Pourquoi éviter le tabac pour la vision ?

Le tabac augmente le risque de maladies oculaires comme la dégénérescence maculaire.

L'exercice physique aide-t-il la vision ?

Oui, l'exercice régulier améliore la circulation sanguine, bénéfique pour la santé oculaire.

Quels traitements pour troubles de la perception ?

Les traitements incluent la thérapie visuelle, les lunettes et parfois la chirurgie.

Comment la thérapie visuelle aide-t-elle ?

La thérapie visuelle améliore la coordination œil-main et la perception visuelle.

Les lunettes corrigent-elles la perception ?

Oui, les lunettes corrigent les erreurs de réfraction et améliorent la perception visuelle.

Quand envisager une chirurgie oculaire ?

La chirurgie est envisagée pour des problèmes structurels comme la cataracte ou le glaucome.

Quels médicaments pour troubles visuels ?

Des médicaments peuvent traiter des conditions comme le glaucome ou les infections oculaires.

Quelles complications des troubles visuels ?

Les complications incluent la perte de vision, l'isolement social et des troubles émotionnels.

Comment les troubles visuels affectent-ils la vie quotidienne ?

Ils peuvent limiter les activités quotidiennes, affecter le travail et la mobilité.

Quels risques de dépression avec troubles visuels ?

Les troubles visuels augmentent le risque de dépression en raison de l'isolement social.

Les troubles de la perception peuvent-ils s'aggraver ?

Oui, sans traitement, certains troubles de la perception peuvent s'aggraver avec le temps.

Quelles sont les conséquences d'une agnosie visuelle ?

L'agnosie visuelle peut entraîner des difficultés dans la reconnaissance d'objets et des interactions sociales.

Quels facteurs de risque pour troubles visuels ?

Les facteurs incluent l'âge, les antécédents familiaux et les maladies chroniques.

Le diabète augmente-t-il les risques visuels ?

Oui, le diabète peut causer des complications oculaires comme la rétinopathie diabétique.

Comment l'hypertension affecte-t-elle la vision ?

L'hypertension peut endommager les vaisseaux sanguins de l'œil, entraînant des troubles visuels.

Le stress influence-t-il la perception visuelle ?

Oui, le stress peut affecter la concentration et la clarté de la perception visuelle.

Les antécédents de traumatismes oculaires sont-ils un risque ?

Oui, les traumatismes oculaires augmentent le risque de troubles de la perception visuelle.

Perception visuelle - Informations médicales vérifiées

Treatment of scaphoid nonunion by arthroscopic cancellous bone grafting.

Dec 2023

DOI: 10.1016/j.otsr.2023.103665 PMID: 37499747

In order to avoid Scaphoid Nonunion Advanced Collapse (SNAC) type osteoarthritis, which progressively affects the radial and midcarpal joints, several vascularized and non-vascularized grafting techni... This prospective study was carried out across 10 centers between September 2019 and April 2021, in patients aged 16 to 65. Scaphoid nonunion grafting was performed arthroscopically. Union was assessed... We included 77 patients with a mean age of 24years (18 to 55years) with a mean time between trauma and treatment of nonunion of 34.8months (6 to 180months). The population was represented by 46 manual... This study demonstrated the effectiveness of arthroscopic treatment of scaphoid nonunion with a union rate at least equivalent to pedicled vascularized grafts. Smoking and delayed treatment were no lo... III....

Humans Young Adult Adult Cancellous Bone Prospective Studies +6 autres

Relationship between thread depth and fixation strength in cancellous bone screw.

Sep 2023

DOI: 10.1016/j.jos.2022.07.003 PMID: 35953407

Clarifying the effect of each parameter of screw design on its fixation strength is critical in the development of any type of screw. The purpose of this study was to clarify the relationship between ... Nine types of custom-made screws with the only changed variable being the thread depth were manufactured. Other elements were fixed at a major diameter of 4.5 mm, a thread region length of 15 mm, a pi... Regardless of the foam-block density, the pull-out strength significantly increased as the thread depth increased from 0.1 mm to 0.4 mm; after that, the increase was more gradual (p < 0.01, respective... The pull-out strength of 4.5-mm-diameter metal screws in a cancellous bone model was found to be biphasic, although linearly correlated with the change in screw depth in both phases. The boundary of t...

Humans Bone Screws Biomechanical Phenomena Cancellous Bone Torque

Mentoplasty with Cancellous Bone Chip Scaffolding: An Innovative Technique for Chin Aesthetics.

01 09 2022

DOI: 10.1097/PRS.0000000000009432 PMID: 35759633

The facial skeleton is foundational for facial aesthetics. The authors describe an alternative technique for cosmetic chin augmentation that does not require alloplastic implants, osseous genioplasty,... Therapeutic, IV....

Cancellous Bone Chin Esthetics Face Genioplasty +1 autres

[Insufficiency fractures of the spine in relation to cancellous bone density : An in vitro study].

Jul 2022

DOI: 10.1007/s00132-022-04261-6 PMID: 35776151

The risk of osteoporotic insufficiency fractures (Fx) at the axial skeleton increases with decreasing bone density, with an accumulation in the thoracic and thoracolumbar regions. To better understand... The entire spines of 26 body donors were fixed in a Plexiglas water phantom and analyzed by high-resolution spiral CT. In addition, CT morphological cancellous bone density was measured in HU from C3 ... OPO was present in all spines. Significantly increased sintering fractures were found in the thoracic and thoracolumbar regions when BMD was below 60 mg/ml. Fx in the cervical spine area were not foun... BMD loss of vertebral body cancellous bone leads to an increased risk of Fx, which is also found in the cadaver spines. However, an apparent threshold for the occurrence of sintering fractures is not ...

Bone Density Cancellous Bone Cervical Vertebrae Fractures, Stress Humans +2 autres

Simple curettage and allogeneic cancellous bone chip impaction grafting in solitary enchondroma of the short tubular bones of the hand.

06 02 2023

DOI: 10.1038/s41598-023-29130-w PMID: 36747044

Enchondroma is the most common bone tumor in the hand. While standard surgical procedure is intra-lesional excision and bone grafting, there is a dispute between allogeneic bone, autogenous bone, and ...

Male Humans Female Adult Cancellous Bone +7 autres

Influence of thread design on anchorage of pedicle screws in cancellous bone: an experimental and analytical analysis.

16 05 2022

DOI: 10.1038/s41598-022-11824-2 PMID: 35577852

Threads of modern pedicle screws can vary greatly in design. It is difficult to assess which interplay of design features is particularly advantageous for screw anchorage. This study aims to increase ...

Biomechanical Phenomena Bone and Bones Cancellous Bone Pedicle Screws

The results of allogenic cancellous bone graft in medial opening wedge high tibial osteotomy.

Apr 2023

DOI: 10.1007/s00590-022-03335-7 PMID: 35867166

There is no clear consensus regarding the optimal filling agent in the medial opening wedge high tibial osteotomy (MOWHTO). In this study, we evaluated the clinical and radiologic outcomes of MOWHTO w... Medical profiles of 122 patients who underwent MOWHTO with cancellous bone graft from iliac crest were retrospectively reviewed. One hundred and two patients (120 knees) who met the study criteria wer... Union of the osteotomy site was observed in all patients within three months after the operation. Loss of correction at the osteotomy site occurred in two knees (1.7%), both of which underwent revisio... Allogenic cancellous bone graft provides efficient gap healing in MOWHTO and can be used as an effective alternative to the autogenous bone graft....

Humans Adolescent Young Adult Adult Middle Aged +7 autres

Alveolar cleft reconstruction using bone marrow aspirate concentrate and iliac cancellous bone: A 12-month randomized clinical study.

Nov 2023

DOI: 10.1007/s00784-023-05276-9 PMID: 37794139

This study aimed to compare the bone density and volume in patients with alveolar cleft reconstructions utilizing bone marrow aspirate concentrate with iliac graft versus iliac graft alone.... Thirty-six patients with unilateral alveolar cleft were randomly allocated into either an intervention group receiving an iliac bone graft mixed with bone marrow concentrate or a control group receivi... Bone volume and bone density demonstrated a statistically significant increase in the intervention group at 6 and 12 months. In contrast, the bone loss ratio decreased significantly in the interventio... A combination of bone marrow concentrate and iliac cancellous bone in alveolar cleft reconstruction may improve bone densities and volume in addition to decreasing graft loss rate.... Using of bone marrow aspirate concentrate will decrease the amount of the graft needed and decrease the ratio of bone loss at the grafted site by the time. Trial registration ClinicalTrials.org ( NCT0...

Humans Alveolar Bone Grafting Cancellous Bone Bone Marrow Cleft Palate +3 autres

Aseptic femoral nonunion treated with exchange locked nailing with intramedullary augmentation cancellous bone graft.

06 Jul 2022

DOI: 10.1186/s13018-022-03229-8 PMID: 35794570

Closed reamed locked intramedullary nailing has been the treatment of choice for most of femoral shaft fractures. A high union rate with a low complication rate is generally predictable. For an asepti... From July 2011 to March 2019, 48 consecutive adult patients (average, 38 years; range, 19-67 years) with aseptic femoral shaft nonunions after intramedullary nailing treatment were studied. All femora... Forty-one patients were followed for an average of 2.8 years (85.4%; range, 1.9-4.5 years) and all fractures healed. The union rate was 100% (41/41, p < 0.001) with a union time of an average of 3.4 m... The described modified bone grafting technique may effectively improve a union rate of exchange femur nailing while the surgical procedure is not complicated. It may therefore be used concomitantly in...

Adult Bone Nails Cancellous Bone Femoral Fractures Femur +6 autres

Measuring Young's modulus of single trabeculae in cancellous bone using a two-point bending test.

02 2023

DOI: 10.1016/j.clinbiomech.2023.105875 PMID: 36634601

Surgical treatment of proximal humeral fractures poses a major challenge, especially in osteoporotic bone. At present, there appears to exist neither a suitable model for research to optimize the oste... Cylindrical samples were taken from ten fresh-frozen human humeral heads and structural analysis was done with μCT. Ten rod-like trabeculae were prepared from five of the humeral heads each which were... It could be shown that with increasing age of the donor, ossified portion of the cancellous bone decreased (p < 0.05). The average degree of mineralization of the bone was 1.24 (±0.06) g/mm... The verified structural parameter showed osteoporotic changes in the examined bone. This study for the first time determined Young's modulus of single trabeculae of cancellous bone of osteoporotically...

Humans Cancellous Bone Elastic Modulus Bone Density Biomechanical Phenomena +1 autres

Perception visuelle : Questions médicales fréquentes

Termes MeSH sélectionnés :

Questions fréquentes et termes MeSH associés

Diagnostic 5

Symptômes 5

Prévention 5

Traitements 5

Complications 5

Facteurs de risque 5

Contenu validé par Dr Olivier Menir

Sous-catégories

Clignement attentionnel

Perception des couleurs

Perception du mouvement

Reconnaissance visuelle des formes

Clôture perceptive

Vision binoculaire

Vision monoculaire

Reconnaissance faciale

Auteurs principaux

Sources (10000 au total)