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blue arcs |
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arcs, blue Entoptic phenomenon appearing as two bands of blue light arching from above and below the source towards the blind spot. This phenomenon is induced by a small source of light (preferably red) stimulating the temporal side of the retina near the fovea. See entoptic image. Want to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit the webmaster's page for free fun content. |
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