Detalhes do Documento

Age-related changes in the human visual system and prevalence of refractive con...

Autor(es): Ferrer-Blasco, Teresa cv logo 1 ; González-Méijome, José Manuel cv logo 2 ; Montés-Micó, Robert cv logo 3

Data: 2008

Identificador Persistente: http://hdl.handle.net/1822/8433

Origem: RepositóriUM - Universidade do Minho

Assunto(s): Refractive error; Myopia; Prevalence; Age


Descrição
PURPOSE: To retrospectively report the trends of change in several parameters of the human visualsystem over a wide age range in patients attending an eye clinic. SETTING: University of Valencia, Valencia, Spain. METHODS: The clinical records of 2654 patients were retrospectively reviewed, and the age, sex, spherocylindrical refraction, visual acuity, keratometry, and intraocular pressure were obtained. Descriptive values for each parameter and the correlations with age and between different parameters were calculated. Vectorial components of refraction, including blur, were also derived from clinical refractive data and then analyzed. RESULTS: Several parameters changed significantly with age, particularly in patients in their sixties and older. An increase in the blur component was mainly associated with astigmatic progression and a trend toward against-the-rule orientation and had the highest correlation with total astigmatism (r2=0.319; P<.001) and visual acuity (r2=0.442; P<.001). Refractive conditions had the most homogeneous distribution in the first decade of life and the most heterogeneous distribution in the group between 61 years and 70 years. CONCLUSIONS: Best corrected visual acuity began to decrease after the 50s, while changes in the blur component were not patent until the 60s to 70s. This could be explained by the poorer optical quality of the human eye in adulthood and elderly persons. Clinically, these changes could be attributed to changes in ocular astigmatism and have an impact on the best visual acuity achievable with optical compensation
Tipo de Documento Artigo
Idioma Inglês
delicious logo  facebook logo  linkedin logo  twitter logo 
degois logo
mendeley logo

Documentos Relacionados



    Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia