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1.
Rev. bras. med. esporte ; 27(4): 419-424, Aug. 2021. tab, graf
Article in English | LILACS | ID: biblio-1288607

ABSTRACT

ABSTRACT Objective: Provides interactive games and human animation real motion data and technical options. Therefore, how to complete the position, attitude detection, and motion recovery under monocular vision has become an important research direction. Methods: This paper improves the part-based human detection algorithm and uses the AdaBoost multi-instance learning algorithm to train the part detector. Results: The results show that obtaining blood pressure waveform based on monocular vision pulse wave is feasible and has generalization. Conclusions: The results show the feasibility and accuracy of the gait motion detection, motion recovery and analysis system for human lower limbs based on monocular vision. Level of evidence II; Therapeutic studies - investigation of treatment results.


RESUMO Objetivo: Fornece jogos interativos e dados de movimento real de animação humana e opções técnicas. Portanto, como completar a posição, detecção de atitude e recuperação de movimento sob visão monocular tornou-se uma importante direção de pesquisa. Métodos: este artigo aprimora o algoritmo de detecção humana baseado em partes e usa o algoritmo de aprendizado de múltiplas instâncias AdaBoost para treinar o detector de partes. Resultados: Os resultados mostram que o método de obtenção da forma de onda da pressão arterial com base na onda de pulso de visão monocular é viável e se pode generalizar. Conclusões: Os resultados mostram a viabilidade e precisão do sistema de detecção, recuperação e análise do movimento da marcha para membros inferiores humanos com base na visão monocular. Nível de evidência II; Estudos terapêuticos- investigação dos resultados do tratamento.


RESUMEN Objetivo: Proporciona juegos interactivos y animación humana, datos de movimiento real y opciones técnicas. Por lo tanto, cómo completar la posición, la detección de actitud y la recuperación de movimiento bajo visión monocular se ha convertido en una importante dirección de investigación. Métodos: este documento mejora el algoritmo de detección humana basado en piezas y utiliza el algoritmo de aprendizaje de instancias múltiples AdaBoost para entrenar el detector de piezas. Resultados: Los resultados muestran que el método de obtención de la forma de onda de la presión arterial basado en la onda de pulso de visión monocular es factible y se puede generalizar. Conclusiones: Los resultados muestran la viabilidad y precisión del sistema de detección, recuperación y análisis del movimiento de la marcha para miembros inferiores humanos basado en visión monocular. Nivel de evidencia II; Estudios terapéuticos- investigación de los resultados del tratamiento.


Subject(s)
Humans , Vision, Monocular , Motion Perception , Movement Disorders/rehabilitation , Pattern Recognition, Visual/physiology , Photic Stimulation/methods , Algorithms
2.
Arq. bras. oftalmol ; 82(2): 98-102, Mar.-Apr. 2019. tab
Article in English | LILACS | ID: biblio-989401

ABSTRACT

ABSTRACT Purpose: To evaluate the clinical and surgical impacts of phenomena that could occur in intermittent exotropia. Methods: The medical records of intermittent exotropia cases from 1991 to 2014 were retrospectively reviewed. All patients underwent a series of measures, including a protocol to assess monocular occlusion based on the propedeutics proposed by Kushner. Results: Outdoor sensitivity was observed in 31% of patients with an undercorrection rate of 44% vs. 18% of cases with no outdoor sensitivity. After 1 h of monocular occlusion, 41% of all patients achieved an increase in deviation with an undercorrection rate of 40%, whereas 25% did not. Conclusion: The results show the importance of complete propedeutics, since there is a higher rate of late undercorrection in cases with outdoor sensitivity and increased deviation after occlusion.


RESUMO Objetivo: Avaliar os impactos clínico e cirúrgico dos fenômenos que podem ocorrer na exotropia intermitente. Métodos: Os prontuários de casos de exotropia intermitente de 1991 a 2014 foram revisados retrospectivamente. Todos os pacientes foram submetidos a uma serie de medidas incluindo o protocolo com oclusão monocular com base na propedêutica proposta por Kushner. Resultados: Outdoor sensitivity foi observada em 31% dos pacientes com taxa de subcorreção de 44% vs. 18% dos casos sem outdoor sensitivity. Após 1 hora de oclusão monocular, 41% de todos os pacientes apresentaram um aumento no desvio com uma taxa de subcorreção 40%, enquanto 25% não. Conclusão: Os resultados demonstram a importância da propedêutica completa, uma vez que há maior taxa de subcorreção tardia nos casos de outdoor sensitivity e maior desvio após a oclusão.


Subject(s)
Humans , Male , Female , Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Young Adult , Exotropia/surgery , Exotropia/physiopathology , Education, Premedical/methods , Postoperative Period , Reoperation , Time Factors , Vision, Monocular/physiology , Visual Acuity/physiology , Medical Records , Retrospective Studies , Treatment Outcome , Convergence, Ocular/physiology , Accommodation, Ocular/physiology
3.
Journal of Chinese Physician ; (12): 1621-1624, 2012.
Article in Chinese | WPRIM | ID: wpr-430678

ABSTRACT

Objective To asses stereoacuity and the factors that influence stereopsis in children after unilateral cataract extraction.Methods Sixty-two children who were diagnosed as unilateral cataract and underwent cataract extraction with intraocular lens implantation were included in this study.Data are recorded on age at presentation and the surgery,the presence of strabismus,the refractive error,and the best corrected distant visual acuity (BCDVA) of both eyes and stereoacuity.Sixty-two patients were followed up for 14 ~ 60 months.Results Sixty-two patients were divided into two groups according to stereoacuity.Thirty-one patients in group A achieved stereopsis better than 400 s of arc.Group B had 31 patients whose stereoacuity was poorer than 400 s of arc.The mean age at presentation and surgery were 4.6 ± 3.4 and 6.3 ±4.5 years in group A and 2.1 ±2.1 and 2.4 ±2.2 years in group B.51.6% of patients in group A achieved a BCDVA of 20/40 or better,but in group B,only 6.5% of patients achieved a BCDVA of 20/40.Those who had strabismus after cataract surgery were 6.5% in group A and 35.5% in group B.There was statistically significant difference in age at presentation and the surgery (t =4.03,4.53,P <0.01),good BCDVA(x2 =15.34,P < 0.01) and absence of strabismus (x2 =7.88,P < 0.01) between two groups.Conclusions Stereopsis can develop in children after pediatric unilateral cataract extraction and intraocular lens implantation.Good stereoacuity is correlated with later manifesting cataracts,absence of strabismus and good BCDVA.

4.
Arq. bras. oftalmol ; 73(6): 521-525, nov.-dez. 2010. ilus, tab
Article in Portuguese | LILACS | ID: lil-572217

ABSTRACT

Objetivos: Quando a visão de um olho está preservada (visão monocular) e há alto risco, baixo prognóstico e/ou recursos limitados para a cirurgia do olho contralateral, não é claro se o beneficio da binocularidade supera o da reorientação para visão monocular. O objetivo é quantificar o impacto da qualidade de visão referida entre a condição binocular e monocular e, nesse último caso, entre congênita e adquirida. Métodos: Pacientes com acuidade visual (AV) com AV>0,5 em cada olho foram submetidos ao questionário estruturado de 14 perguntas (VF-14), onde a pontuação de 0 a 100 indica o nível de satisfação do paciente com sua visão, variando de baixo a alto respectivamente. Dados epidemiológicos e pontuações dos quatro grupos foram registrados e submetidos à análise estatística. Resultados: A entrevista pelo VF-14 com 56 indivíduos revelou que a pontuação mais alta foi similar entre os controles e os portadores de visão monocular congênita, e níveis intermediários e baixos foram obtidos por indivíduos com visão monocular adquirida e cegos bilaterais, respectivamente (p<0,001). As atividades mais difíceis para os indivíduos com visão monocular adquirida foram identificar letras pequenas, reconhecer pessoas, distinguir sinais de trânsito e assistir TV. Conclusão: O estudo confirmou que a perda da visão tem impacto desfavorável no desempenho referido das atividades sendo maior na visão monocular adquirida do que na congênita. Os dados sugerem que medidas de reabilitação devem ser consideradas para melhorar a qualidade da visão em doenças intratáveis ou de alto risco ou de baixo prognóstico.


Purpose: When the vision in one eye is preserved (monocular vision) and there is high risk, low prognosis and/or limited resources to the fellow eye surgery, it is unclear if the benefit of binocularity outweighs the reorientation for monocular vision. The goal is to quantify the impact of the quality of vision of both binocular and monocular condition, and in this latter case, between congenital and acquired. Methods: Patients with visual acuity (VA)>0.5 in each eye underwent a structured questionnaire of 14 questions (VF-14), which the score 0-100 indicates the level of patient satisfaction with their vision, ranging from low to high respectively. Epidemiological data and scores of the four groups were recorded and analyzed statistically. Results: The interview by the VF-14 with 56 subjects revealed that the highest score was similar between controls and patients with congenital monocular vision, and low and intermediate levels were obtained by individuals with acquired monocular vision and bilaterally blind, respectively (p<0.001). The more difficult activities for individuals with acquired monocular vision were to identify small print, recognize people, to distinguish traffic lights and watch TV. Conclusion: The study confirmed that the vision loss has an adverse impact on the performance of such activities being higher in congenital than in acquired monocular vision. The data suggest that rehabilitation measures should be considered to improve the quality of vision in intractable diseases, high risk or low prognosis.


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Young Adult , Blindness/physiopathology , Diagnostic Self Evaluation , Vision, Monocular/physiology , Blindness/congenital , Blindness/epidemiology , Blindness/etiology , Brazil/epidemiology , Case-Control Studies , Quality of Life , Sex Distribution , Surveys and Questionnaires , Vision, Binocular/physiology , Vision, Monocular/genetics , Visual Acuity/physiology
5.
Rev. Méd. Clín. Condes ; 21(6): 966-970, nov. 2010. tab
Article in Spanish | LILACS | ID: biblio-999261

ABSTRACT

La pérdida transitoria de la visión monocular (PTVM), es un síntoma alarmante relacionado frecuentemente con alteraciones vasculares retinales y puede tener consecuencias importantes desde el punto de vista ocular y vital. Es por ello, que se requiere de un manejo precoz y adecuado. El presente artículo tiene por objeto revisar las principales causas, su presentación, diagnóstico y manejo, como enfermedades oclusivas vasculares y alteraciones el nervio óptico entre otras


Transient monocular vision loss (TMVL) is an alarming symptom often in relation with retinal vascular anomalies that may have severe consequences for vision and life, so it should be evaluated urgently and a prompt approach is needed. This article will review the main causes, its presentation, diagnosis and management such as vascular occlusive diseases and optic nerve abnormalities among others


Subject(s)
Humans , Vision Disorders/diagnosis , Vision Disorders/etiology , Vision Disorders/therapy , Vision, Monocular , Ischemic Attack, Transient/complications , Optic Nerve Diseases/complications , Amaurosis Fugax/diagnosis , Amaurosis Fugax/etiology , Amaurosis Fugax/therapy , Ischemia/complications , Migraine Disorders/complications
6.
Arq. bras. oftalmol ; 73(5): 399-404, Sept.-Oct. 2010. tab
Article in Portuguese | LILACS | ID: lil-570498

ABSTRACT

OBJETIVO: Verificar em dois grupos de pacientes com visão monocular (grupo 1) e com visão binocular (grupo 2), a serem submetidos à cirurgia de catarata num hospital universitário, opiniões em relação ao problema ocular, à qualidade da visão e à cirurgia de catarata. MÉTODOS: Foi realizado estudo transversal e comparativo, de forma consecutiva, por meio de questionário estruturado, aplicado por entrevista a pacientes, elaborado a partir de estudo exploratório e medidas acuidade visual e causa da perda visual. RESULTADOS: A amostra foi constituída por 96 indivíduos do grupo 1 (50,0 por cento homens; 50,0 por cento mulheres, com idade entre 41 e 91 anos, média 69,3 anos ± 10,4 anos) e 110, do grupo 2 (40,9 por cento homens; 59,1 por cento mulheres, com idade entre 40 e 89 anos, média 68,2 anos ± 10,2 anos). A maioria dos indivíduos de ambos os grupos apresentava baixa escolaridade. Não houve diferença estatisticamente significante entre os grupos em relação ao sexo (p=0,191), à idade (p=0,702) e à escolaridade (p=0,245). Não exerciam atividade laboral 95,8 por cento dos indivíduos do grupo 1 e 83,6 por cento, do grupo 2 (p=0,005) e 30,4 por cento do grupo 1 mencionaram não ter possibilidade de trabalhar por causa da deficiência visual. Observou-se acuidade visual do olho a ser operado menor que 0,05 em 40,6 por cento (grupo 1) e 33,6 por cento (grupo 2), entre 0,25 e 0,05. Quase a totalidade dos indivíduos de ambos os grupos afirmou ter dificuldade para realização das atividades de vida diária e qualificou como insuficiente a respectiva acuidade visual; 71,9 por cento dos entrevistados do grupo 1 e 71,6 por cento, do grupo 2 mencionaram saber a causa da visão fraca; desses, 87,1 por cento do grupo 1 e 83,3 por cento do grupo 2 referiram a catarata como causa da baixa acuidade visual. CONCLUSÃO: Os indivíduos de ambos os grupos tiveram acesso à cirurgia de catarata com acuidade visual menor do que a idealmente indicada; os pacientes com visão monocular apresentaram acuidade visual significativamente menor em relação aos com visão binocular; a maioria dos entrevistados de ambos os grupos referiu dificuldades para realizar atividades cotidianas como consequência da baixa visão; muitos indivíduos de ambos os grupos desconheciam a causa da dificuldade visual ou a atribuíram a outra causa que não a catarata.


PURPOSE: To verify in two groups of patients: monocular (group 1) and binocular vision (group 2) to be submitted to cataract surgery at an University Hospital, opinions, expectances and emotional reactions related to the ocular problem, to the quality of vision and to cataract surgery. METHODS: A transversal comparative and consecutive study was performed using a structured questionnaire applied by patients interview. The questionnaire was elaborated from a previous exploratory study; visual acuity and cause of the visual loss were evaluated. RESULTS: The sample was constituted by 96 persons of group 1 (50.0 percent male; 50.0 percent female, ages ranging from 41 to 91 years; average 69.3 years ± 10.4 years) and 110 persons of group 2 (40.9 percent male; 59.1 percent female, ages ranging from 40 to 89 years; average 68.2 years ± 10.2 years). The majority of persons of both groups presented low educational level. There was no statistically significant difference between the groups in relation to gender (p=0.191), age (p=0.702) and educational level (p=0.245). No work activity was mentioned in 95.8 percent of the persons of group 1 and 83.6 percent of group 2 (p=0.005) and 30.4 percent of group 1 informed the impossibility to work due the visual impairment. Visual acuity of the eye to be operated was less than 0.05 in 40.6 percent (group 1) and in 33,6 percent (group 2), presented visual acuity ranging from 0.05 to 0.25. Almost the totality of the persons of both groups informed difficulties to perform activities of daily life and qualified as insufficient their visual acuities; 71.9 percent of the patients of group 1 and 71.6 percent of group 2 informed to know the reason of low vision; among these, 87.1 percent of group 1 and 83.3 percent of group 2 mentioned cataract as the reason of low visual acuity. CONCLUSION: It was concluded that the patients of both groups were submitted to cataract surgery with visual acuities less than the visual ...


Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Cataract Extraction/statistics & numerical data , Cataract/psychology , Health Knowledge, Attitudes, Practice , Vision, Binocular/physiology , Vision, Monocular/physiology , Visual Acuity/physiology , Activities of Daily Living/psychology , Cross-Sectional Studies , Cataract Extraction/psychology , Cataract/etiology , Cataract/physiopathology , Treatment Outcome
7.
Rev. bras. oftalmol ; 69(2): 121-124, Mar.-Apr. 2010. ilus, tab
Article in English | LILACS | ID: lil-549898

ABSTRACT

We demonstrate the combination of pseudophakic monovision technique with toric IOL in patients with relevant corneal astigmatism to reduce spectacle dependence after cataract surgery. All patients achieved UCDVA ³ 20/30 and UCNVA ³ J2 and none of them required spectacle correction on the 6th postoperative month.


Nós demonstramos a combinação da técnica de monovisão pseudofácica com lente intraocular tórica em pacientes com astigmatismo corneano relevante para reduzir a dependência de óculos após a cirurgia de catarata. Todos os pacientes apresentaram AVsc ³ 20/30 para longe e ³ J2 para perto, sendo que nenhum deles necessitou de correção ótica até o sexto mês pós-operatório.


Subject(s)
Humans , Male , Female , Middle Aged , Astigmatism , Cataract Extraction/methods , Lens Implantation, Intraocular , Phacoemulsification , Pseudophakia , Visual Acuity , Vision, Monocular/physiology
8.
Chinese Journal of Postgraduates of Medicine ; (36): 29-31, 2010.
Article in Chinese | WPRIM | ID: wpr-387136

ABSTRACT

Objective To study the characteristic of operation design and analyze curative effect of laser sub-epithelial keratomileusis (LASEK) on low and midrange myopia in aged patients. Method Fiftyeight patients ( 114 eyes) no less than 35 years old were treated with LASEK by monoblepsis. The subjects were examined and analyzed at 3 days, 7 days, 1 month,3 months and 6 months after operation. Results Seventy-one corneas(62.28%) recovered well at 3 days after operation. At 1 month after operation, the acuity of vision of all patients achieved or exceeded corrected vision before operation,and lasted to 6 months after operation. The break up time of 63 eyes were lower than normal at 3 months after operation,but 6 months after operation all of them recovered to normal. The satisfaction of patients raised gradually. Conclusions LASEK is effective for no less than 35 years old myopic patients. Make operation plan refer to monoblepsis and patients' needs can receive more satisfaction.

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