This increased depth of tissue in the peripheral zone, containing as it does the muscular fibres and capillaries, partly accounts for the opacity of the structures and prevents the posterior pigment from shining through, hence the absence of a blue effect. In some of the Birds of Paradise, notably in Lawes' Bird of Paradise (Parotia lawesi), and possibly in other species, striking colour effects are produced by a differential colouring of the iris. At the ends the photoreceptors; cones and rods, there is a microscopic layer of mostly lipids (thus "oil droplet"). How? The total color change takes two-three weeks and is permanent. I also watched moments of the video frame by frame and noticed that the yellow doesn't seem to be in the sclera, but rather in the pupil too. Ask a science question, get a science answer. This however is not the whole explanation. https://www.nationalgeographic.com/science/phenomena/2010/12/14/bird-of-paradise-creates-colourful-dance-with-microscopic-mirrors-in-its-feathers/. The total color change takes two-three weeks and is permanent. Two pairs of spatulate wires come out of her hair, one in each side, partially mimicking real parotias (which have three pairs). A release date has not yet been determined. New comments cannot be posted and votes cannot be cast. It's something that we don't have (but can be present in some amphibians and fishes). But Homer said he did not plan to pursue FDA approval in the U.S. until next year. Homer said the company will treat 100 more patients and follow them for a year before it finally releases the technology. (2) The absence of anterior yellow pigment cells in the inner zone. In an eye with normal pigmentation the eye reflects a silvery greenish color in bright light. Homer said that pigmentary glaucoma had not proved to be a problem so far. He said none of them had suffered any negative effects. While her hair covers the ma… This co]our effect is brought about in two ways. Riaz noted that the U.S. Food and Drug Administration would have to approve the procedure if marketed in the U.S. (3) A peculiar physical conformation of the connective tissue cells in this area. The Western or Arfak Parotia, Parotia sefilata, is a medium-sized, approximately 33cm long, bird of paradise with a medium-length tail. How this bird is able to manipulate this in the way the video shows: I'm unsure. If a vertical section of the iris taken at right angles to the surface be examined under a low power the iris in the outer or yellow zone will be found to be four or five times thicker than in the inner or blue zone. At the back of the eye there is a layer of reflective pigment called the choroid layer. This mirrorlike layer reflects available light and allows dogs to see well even in very dim light. See, it looks bicolor when the eyes are relaxed: link and link. The greater part of the blue effect is no doubt due to the presence of this underlying black pigment seen through translucent tissues. However, it anticipates the retail price of the procedure in the U.S. will be around $5,000. These elongated cells lie over the muscle fibre cells, and if the anterior surface of the iris in this situation be examined under a low power the parallel fibrillae bring about a diffraction grating effect. The ends of these cells break up in hardened specimens into fibrillae which separate into wisp-like fringes. Even more strange, I can't seem to find any references to this eye color change anywhere else on the internet, and yet I just watched it happen several times in its full 4K HDR glory. Parotia's hair is short but puffy, being almost entirely black, with the upper part being black with a white part on the front and spiky on it's sides, simulating the head of a real parotia. Funny that you were looking for the same thing and found my question. MEDILL SCHOOL OF JOURNALISM, MEDIA,INTEGRATED MARKETING COMMUNICATIONS1845 Sheridan RoadEvanston, IL 60208-2101, Photo at top: Strōma claims blue eyes are “the most sought-after eye color.”. If you want to change your eye color, your best and safest bet is to be fitted for color contacts by a licensed Ophthalmologist. In eyes lacking pigment the eye … With this our best guess was the following: I think that when the iris expands to shrink the pupil, the blue is compressed around the pupil and "disappears". Stroma, from which the corporation takes its name, is a layer of interlaced tissue in the iris. 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