Navegando por Palavras-chave "Ophthalmoscopes"

Agora exibindo 1 - 1 de 1
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Desenvolvimento e resultados preliminares de um sistema cromático de iluminação para oftalmoscópios indiretos
    (Conselho Brasileiro de Oftalmologia, 2009-04-01) Oliveira, Thiago Bellini; Trevelin, Luis Carlos; Moreira, Fernando Manoel Araújo; Bagnato, Vanderlei Salvador; Schor, Paulo [UNIFESP]; Carvalho, Luis Alberto Vieira De [UNIFESP]; Universidade Federal de São Carlos Programa de Pós-graduação em Biotecnologia; Computing Lab da UniKent; UFSCAR Departamento de Biotecnologia; University of Maryland Center for Superconductivity Research; Massachusetts Institute of Technology; Universidade de São Paulo (USP); Universidade Federal de São Paulo (UNIFESP)
    PURPOSE: Chromatic contrast is a technique used in some areas of medicine to provide better visualization of biological tissues. Based on principles of color composition, a new illumination system was constructed using colored emitting diodes to reproduce the spectral range of visible light. This technique was devised to be used in indirect ophthalmoscopes to improve the visualization of the posterior segment of the eye. METHODS: The original illumination system of a general purpose indirect ophthalmoscope was substituted by a system of color-emitting diodes. RESULTS: Using an electronic interface it was possible to control the intensity of the color lights and therefore generate different wavelengths in the visible spectrum of the light. Preliminary tests undertaken in a mechanical model of the human eye generated very clear and homogenous colors. However in vivo examinations with patients were performed in our laboratory at the IFSC-USP and UNIFESP, and obtained the preliminary results show the possibilities of the chromatic contrast technique, and may represent in the future a differential in the analyses of the posterior segment of the eye. CONCLUSION: The use of color-emitting diodes to reproduce the spectral range of the visible light in indirect ophthalmoscopes seems to be a promising technological advance in the fundoscopy of the eye. This is an innovation that can yield better quality examinations with indirect ophthalmoscopes.