Backwards retina:aids to color vision (Introduction)

by David Turell , Wednesday, March 18, 2015, 17:59 (3324 days ago) @ David Turell

More refutation of the 'poor design' argument by atheists that a designer 'would have never done it' in such a backwards way. Nonsense. the design is turning out to be excellent for day and night vision:-http://www.scientificamerican.com/article/the-purpose-of-our-eyes-strange-wiring-is-unveiled/?WT.mc_id=SA_DD_20150318-"The result was easy to notice: in each layer of the retina we saw that the light was not scattered evenly, but concentrated in a few spots. These spots were continued from layer to layer, thus creating elongated columns of light leading from the entrance of the retina down to the cones at the detection layer. Light was concentrated in these columns up to ten times, compared to the average intensity.-"Even more interesting was the fact that the colours that were best guided by the glial cells matched nicely with the colours of the cones. The cones are not as sensitive as the rods, so this additional light allowed them to function better—even under lower light levels. Meanwhile, the bluer light, that was not well-captured in the glial cells, was scattered onto the rods in its vicinity.-"These results mean that the retina of the eye has been optimised so that the sizes and densities of glial cells match the colours to which the eye is sensitive (which is in itself an optimisation process suited to our needs). This optimisation is such that colour vision during the day is enhanced, while night-time vision suffers very little. The effect also works best when the pupils are contracted at high illumination, further adding to the clarity of our colour vision."