A previous blog drew attention to Glial (or Muller) cells that conduct light from the surface of the eye’s retina to the photoreceptor cells. These cells provide a low-scattering passage for light from the retinal surface to the photoreceptor cells, thus acting as optical fibres. Their function was reported to “mediate the image transfer through the vertebrate retina with minimal distortion and low loss”. New research in this area has increased knowledge of their functionality after constructing a light-guiding model of the retina outside the fovea. As a result, the “retina is revealed as an optimal structure designed for improving the sharpness of images”.
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