prisma de Risley

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• prisma de Risley — Eng. Risley s prism Prisma que se emplea para el examen del desequilibrio de los músculos oculares …   Diccionario de oftalmología

• prism — A transparent solid, with sides that converge at an angle, that deflects a ray of light toward the thickest portion (the base) and splits white light into its component colors; in spectacles, a p. corrects ocular muscle im …   Medical dictionary