Mixtures of pigments can also produce different and unusual color hues and shades. For example, the dull olive-green colors of certain forest birds is actually a mixture of yellow carotenoid pigments and dark-brown melanin pigments. Then we get to the second main ingredient that produces color: keratin. Keratin is the tough protein of which feathers are made. It also covers birdsâ bills, feet and legs. Keratin is responsible for the iridescent coloring of many spectacular bird species.
What is PROKERA Â®? PROKERA Â® is a therapeutic device used by eye doctors around the world to protect, repair and heal damaged eye surfaces. PROKERA Â® is made by clipping a piece of amniotic membrane tissue in between two rings made out of a clear, flexible material. What is amniotic membrane tissue? Amniotic membrane is part of the placenta and is the tissue closest to the baby throughout development in the womb.
Next generation of PROKERA biologic corneal bandage devices. Bandages able to reduce inflammation and promote healing for ocular surface conditions. The next generation of biologic corneal bandage devices can reduce inflammation and promote healing for an extended range of ocular surface conditions from mild to severe.