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Published on: November 27, 2017
La disposición de las tres clases de conos en el ojo humano vivo
1Center for Visual Science, University of Rochester, New York 14627, USA. aroorda@popmail.opt.uh.edu
Nature
|February 24, 1999
Resumen
La visión humana del color depende de las células cono, pero su disposición limita la percepción local del color. Las nuevas imágenes de óptica adaptativa revelan el detallado mosaico de conos sensibles a longitudes de onda cortas, medianas y largas en los ojos vivos.
Área de la Ciencia:
- Visión Visión Ciencia Ciencia.
- Imágenes de la retina.
- Fisiología Humana Fisiología Humana
Sus antecedentes:
- La visión humana del color depende de tres tipos de cono: corto (S), medio (M) y largo (L) sensibles a la longitud de onda.
- Las clases de conos están entrelazadas, lo que significa que solo un tipo de cono muestra la imagen en cualquier punto de la retina, causando daltonismo local.
- Investigaciones anteriores mapearon la topografía del cono S, pero las disposiciones de los conos L y M en humanos no se analizaron.
Objetivo del estudio:
- Para visualizar y analizar la disposición espacial de los conos S, M y L en la retina humana viva.
- Para investigar el impacto de la topografía de mosaico de cono en la percepción visual.
Principales métodos:
- Utilizó tecnología de óptica adaptativa para lograr una resolución sin precedentes en imágenes de retina.
- Combinación de óptica adaptativa con densitometría retiniana para capturar imágenes de fotorreceptores de cono.
- Analizó la disposición y las proporciones de los conos S, M y L en dos sujetos masculinos.
Principales resultados:
- Obtuvo las primeras imágenes in vivo que detallan la disposición de los conos S, M y L en el ojo humano.
- Se observaron variaciones significativas en la proporción de conos L a M entre sujetos con visión de color normal.
- Se identificaron grandes áreas de la retina que carecen de conos M o L en ambos sujetos.
Conclusiones:
- La disposición específica de los mosaicos de cono, incluidos los tipos de cono que faltan en parches, afecta la capacidad del sistema visual para resolver altas frecuencias espaciales.
- Esta topografía de cono puede cambiar los detalles del color para una mejor percepción del contraste de luminancia en altas frecuencias espaciales.
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