Abbott has earned FDA approval for its Tecnis Symfony Intraocular Lenses for the treatment of cataracts. The approval includes the Tecnis Symfony Toric IOL, a version of the lenses that are made for people with astigmatism.
Human eye sees color by mixing the signal from three different cones cells in the retina. Cones sensitive to red, green and blue light respectively. The brain interpret color based on those three signals.
CC cycle 3 week 5 ( the 5 main senses) Human Eye coloring page.you can color the pages directly online. What's so cool is you can choose from a variety of coloring options from markers, crayons, colored pencils etc :-)