ABSTRACT
ABSTRACT Objective: The goal of the study is to analyze the color vision acuity pattern in undergraduates of health courses and to discuss the impact of these diseases in this population. Color deficiencies interfere significantly in the daily routine of professionals in the health area who need to discern different color hues in several situations of their everyday practice. Methods: Sixty-four volunteers, undergraduates of health courses of the Federal University of Alfenas (UNIFAL-MG), participated in the study. One man was excluded because he did not fit the inclusion criteria. Two groups were analyzed according to sex with the Farnsworth Munsell 100-Hue test. Results: There were no significant differences between the eyes and between the groups analyzed. The color vision acuity pattern is between 35 and 40, according to the Total Error Score. The gender issue does not influence the general pattern of the color vision acuity of the health courses undergraduates when those with color vision disorders are removed. Conclusion: Screenings and guidance should be given to undergraduates of health courses so that, aware of their condition of presenting some type of color disorder, they shall make the appropriate decision on which career to follow so that such limitation does not interfere with the quality of their daily life.
RESUMO Objetivo: O objetivo do estudo é analisar a acuidade visual média para cores de estudantes da área de saúde e discutir o impacto das doenças que a afetam nessa população. Deficiências cromáticas interferem de forma significativa no dia a dia de profissionais da área da saúde que necessitam de discernir diferentes matizes em diversas situações de sua prática profissional. Métodos: Participaram da pesquisa 64 voluntários, estudantes de cursos da área de saúde da Universidade Federal de Alfenas, sendo que 1 homem foi excluído por não se adequar aos critérios de inclusão. Dois grupos foram analisados, de acordo com o sexo, com o teste de Farnsworth Munsell 100-Hue. Resultados: Não houve diferenças significativas entre os olhos e entre os grupos analisados. O padrão de visão de cores encontra-se entre 35 e 40, de acordo com a Pontuação do Erro Total. A questão de gênero não influencia no padrão geral da qualidade de visão de cores de estudantes da área de saúde, quando retirados aqueles que apresentam distúrbios da visão cromática. Conclusão: Devem ser realizadas triagens e orientação para estudantes de cursos da área de saúde para que, cientes da sua condição de apresentar algum tipo de distúrbio cromático, possam tomar a decisão adequada sobre qual carreira seguir para que tal limitação não interfira na qualidade de sua vida diária.
Subject(s)
Humans , Male , Female , Students, Health Occupations , Color Vision Defects/diagnosis , Color Vision Defects/epidemiology , Health Personnel , Color Perception Tests/methods , Professional Competence , Quality of Life , Schools, Health Occupations , Visual Acuity , Vision Screening , Color Vision Defects/psychology , Diagnosis, Computer-Assisted/methods , Color Perception/physiology , Color Vision/physiologyABSTRACT
OBJETIVO: Avaliar a freqüência de discromatopsias através da 4ª edição do teste pseudoisocromático HRR (Hardy, Rand and Rittler) entre a população indígena masculina da aldeia Lalima, etnia Terena, na região de Miranda-MS. MÉTODOS: Foram realizadas viagens à aldeia Lalima em Miranda-MS, nos meses de janeiro e fevereiro de 2005. As viagens para realizar os exames só foram iniciadas após o projeto ter sido avaliado e aprovado pelos Comitê de Ética e Pesquisa da UFMS, Comitê Nacional de Ética e Pesquisa, Fundação Nacional do índio e do cacique da aldeia Lalima. O teste HRR foi aplicado em 226 índios após terem sido submetidos a exame oftalmológico para detecção de anormalidades que pudessem comprometer a aplicabilidade do teste. O teste foi realizado sob luz natural, em dias ensolarados, sem incidência direta de sol. O teste foi aplicado e interpretado pelo mesmo examinador em todos os índios. RESULTADOS: Realizaram-se 226 exames (60,1 por cento) de uma população de 376 homens entre 10 e 45 anos de idade, que vivem na Aldeia Lalima. Não foi encontrado nenhum caso de discromatopsia na população examinada com o teste HRR. CONCLUSÃO: O resultado do presente estudo mostra a baixa prevalência de discromatopsia nesta população indígena de etnia Terena, uma vez que não se detectou nenhum caso de discromatopsia na população estudada, sendo a prevalência de discromatopsia entre homens caucasianos de 6 a 8 por cento. A ausência de discromatopsia na população estudada, no entanto, deve ser mais bem avaliada tentando aumentar o tamanho da amostra, utilização de outros testes e, principalmente, por estudos genéticos para verificar os genes codificadores dos fotopigmentos para melhor compreensão das condições relacionadas à visão de cores dessa comunidade indígena.
PURPOSE: to evaluate the frequency of dyschromatopsias among the 10 to 45-year-old male Indian population of Lalima village, Terena ethnicity, in Miranda-MS, using the fourth edition of the pseudoisochromatic HRR test (Hardy, Rand and Rittler). METHODS: Lalima village in Miranda-MS was visited in January and February 2005. The visits only occurred after the approval of the project by the Committee of Ethics and Research of UFMS, by the National Committee of Ethics and Research, by the Indian National Foundation, and by the chief of Lalima village. The test was applied in 226 Indians who had been previously submitted to ophthalmologic examination for the detection of abnormalities that could doubt the applicability of the test. The test was performed under natural illumination, in sunny days, however with no direct sunlight. The test was applied and analyzed by the same experimenter in all the Indians. RESULTS: Two hundred and twenty-six men were examined (60.1 percent) of the total male population of 376 individuals between 10 and 45 years old who live in Lalima village. No cases of dyschromatopsia were found in this population examined with the HRR test. CONCLUSIONS: Once it is known that incidence of dyschromatopsias among the white male Caucasian population is about 6-8 percent, the results of the present study indicate a low prevalence of dyschromatopsias in this Indian population of Terena ethnicity, since no cases were detected in the examined sample. Other studies using different methods must be made to reinforce the present results. It would also be interesting to genetically examine this population and verify the genes that code for photopigments.
Subject(s)
Humans , Male , Child , Adolescent , Adult , Middle Aged , Color Perception Tests/methods , Color Vision Defects/epidemiology , Population Groups , Age Distribution , Brazil/epidemiology , Color Vision Defects/diagnosis , Color Vision Defects/ethnology , Lighting , Photic Stimulation , Prevalence , Reproducibility of Results , StatisticsABSTRACT
One previous study [1980] reported a lower prevalence rate of congenital color vision defects in Saudi Arabian males [4.7%] compared with Caucasian males [8%]. This study aimed to re-evaluate the findings of those studies to take into account recent migration and urbanizatiom trends in Saudi Arabia. Six hundred adult male subjects divided equally between two cities [Riyadh and Qaseem] in the Central Region of Saudi Arabia were assessed for color vision using the Ishihara plates. The prevalence of congenuital color vision defects was found to be 7.2% in Saudi Arabian males, varying from 8.3% in the Riyadh Area to 6% the Qaseem Area. These results indicate a higher prevalence a of congenital color vision defects in Saudi Arabian males than previously thought, and we suggest that this is due to recent and on going migration and urbanization trends in Saudi Arabia
Subject(s)
Humans , Male , Epidemiologic Studies , Prevalence , Consanguinity , Urbanization , Color Vision Defects/epidemiologyABSTRACT
PURPOSE: To study color vision in patients with oculocutaneous albinism (OCA) METHODS: We evaluated color vision in 42 patients with OCA using the HRR color plates. Sixty seven percent of the patients had the Hermansky-Pudlak syndrome (HPS), diagnosed genetically or clinically. The remaining patients had unknown mutations leading to OCA. RESULTS: 47.6 of patients of OCA of all types included had a color vision defect. Of these, 55 were female and 45 were male patients. 50 of patients with the HPS (all types) had a color vision deficit. 42.9 of patients with OCA of unknown type had color weakness. 57.1 had normal color vision. CONCLUSIONS: Results suggest that many patients with OCA and the HPS have a mild red-green color perception deficiency that is not a sex linked trait. The prevalence of color vision deficits in our study population increased with decreasing visual acuity
Subject(s)
Male , Female , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Humans , Color Perception , Color Vision Defects/etiology , Hermanski-Pudlak Syndrome/complications , Albinism, Oculocutaneous/classification , Albinism, Oculocutaneous/complications , Albinism, Oculocutaneous/physiopathology , Color Vision Defects/epidemiology , Color Vision Defects/genetics , Genetic Heterogeneity , Genotype , Incidence , Phenotype , Prospective Studies , Color Perception/genetics , Membrane Proteins/genetics , Carrier Proteins/genetics , Hermanski-Pudlak Syndrome/classification , Hermanski-Pudlak Syndrome/genetics , Hermanski-Pudlak Syndrome/physiopathology , Visual AcuityABSTRACT
Incidence of Red-Green colour blindness was studied in a Libyan population and was then compared with the same in two samples of Indian population. The incidence of the Red-Green colour defect was found to be 2.209% amongst the males and 0.0% amongst the females in the Libyan study. However, the incidence was only 1.841% amongst the ethnic Libyan males. This incidence was comparable with those reported from other African countries like Congo and Uganda. The incidence of Red-Green colour defect amongst the Indian males was found to be 2.295% while it was 0.840% amongst the Indian females.
Subject(s)
Adolescent , Adult , Color Perception/physiology , Color Vision Defects/epidemiology , Female , Humans , Incidence , India/epidemiology , Libya/epidemiology , Male , Sex FactorsSubject(s)
Adolescent , Adult , Aged , Child , Color Vision Defects/epidemiology , Female , Humans , India , Male , Middle Aged , Pedigree , Rural HealthSubject(s)
Adolescent , Color Vision Defects/epidemiology , Female , Humans , India , Male , Mass Screening , Sex FactorsABSTRACT
Estudou-se um total de 868 homens (806 índios, 62 mestiços) e 962 mulheres (886 índias, 76 mestiças), em 18 aldeias de 7 tribos indígenas brasileiras. Näo foram encontrados daltônicos nas populaçöes do Içana, Ticuna, Kanamari, Katukina e Caingang. Um cego para o verde foi observado entre 110 Macushi e outro entre 46 Cashinawa. Um dos 62 mestiços estudados nas diferentes comunidades também apresentava cegueira para o verde. Näo foram encontradas daltônicas entre as mulheres. Fez-se uma revisäo sobre os dados anteriores relativos à prevalência de daltonismo em índios sul-americanos. Somando-se os resultados do presente estudo àqueles obtidos no passado obtém-se um total de 2.384 homens e 2.230 mulheres testadas. As freqüências de 5% e 7% observadas entre os homens Yanomama e Jivaro deveräo ser confirmadas, pois as das outras tribos variam apenas de 0.2%
Subject(s)
Humans , Male , Female , Color Perception , Color Vision Defects/epidemiology , Indians, South American , BrazilABSTRACT
Of the 1553 male and 519 female students in schools of Patiala, between the age group of 10 and 15 years, 3.85% males and 0.38% females were found colour-blind. The students were tested by Ishihara Charts, Edridge Green Lantern and then assayed by Pickford Nicolson Anomaloscope and the results were presented in detail. In addition, the affected students were also tested for their acuity of vision and were found normal.