If blood is red, why do veins look blue?
Talking about thisSo, veins carry deoxygenated blood from tissues to the heart, the exception being pulmonary and umbilical veins.But, veins don't appear blue because they are carrying deoxygenated blood.Human blood = red (or some shades of red like deoxygenated blood being darker particularly maroon)I am saying human blood, because we use iron to bind oxygen unlike lobsters, spiders who have copper as their main oxygen receptor thus giving their blood a blue colour.The red colour of our blood is because of haemoglobin, iron and molecular oxygen. This complex mainly absorbs higher energy, shorter wavelength blue and green light, leaving behind primarily red wavelength for our eyes to detect.Blue light gets absorbed and scattered on its way through our skin than red light due to the structure of skin and fat tissue.Veins are very close to skin surface unlike oxygenated blood carrying arteries which are buried deep inside tissues. And since they are larger and have thinner walls, they provide the paltform to reflect blue light as it is absorbed more than red once it reaches the veins.And also there is a significant role of our processing as well. The vein area is interpreted bluer in comparison to the surrounding skin by our brains.The veins with even less skin covering it, appears red, for ex on eyes, on retina ( one is on my cheek ) as there isn't enough tissue covering the blue vein effect.
Is it normal to have ultra bright blue veins?
My veins look very bright blue.I think the lighter your skin is the brighter blue your veins look. Veins carry deoxygenated blood of course, with carbon dioxide and carbon dioxide in the form of a gas looks like the same very bright blue…But I’ve been told that CO2 isn’t the reason superficial veins look blue…it’s about the light that reflects around the skin over the vein that makes it look blue…the light reflection isn’t this simple to me but…I like to think they’re blue due to CO2 buildup but when I see veins inside the body…sure enough…they are red…darker red than arterial blood but yes, red.If you’ve had a specific medication or contrast dye given to you for a CT or X-ray maybe the contrast dye is being picked up in your venous blood before its excreted. Being exposed to radiation might make them look a brighter blue but it would take a lot.I can’t tell really unless I saw them…but they definitely look bright blue just under the skin..
When I close one eye, things seem bluer, and in the other eye things seem more red?
I noticed this about myself some time ago. Weird thing is I noticed that it switched which was the blue eye and which was more red. After some experimentation, I figured this out: Stand with a light source to one side of you, then close one eye at a time. The eye closest to the light source will seem to give everything a blue tone, and the opposite side red. This works at least with incandescent light sources. I imagine it has more to do with the brain compensating for the light imbalance than any actual optic effect. At any rate, nice observation, I'm glad somebody noticed this besides me!
Why is there blueish purple circles under my eyes and how can I get rid of this? It isn’t puffy but It’s noticeable?
The cornerstone is, which is the origin of the circles?. Skin color are coming from “dots” of pigment called “melanosomes” (like the Ben-Gay technique in comics’ coloring). There are two conditions: too much pigment (like a racoon) or due to a deflation of fat, the color units (the dots are closer and give darker coloration for more concentration. For pigment only, bleaching creams and Q-switched/picosecond laser are treatment options (and sun blockers) . For deflation correction, fillers as calcic hidroxyapatite/policaprolactona and fat grafting stretch skin and separate melanosomes (avoid hyaluronic acid because Tyndall's effect).Sometimes, lack of fat between the skin and orbicularis muscle, allow to see the muscle coloration (dark). The way to solve it is fat grafting (nano fat graft).Other option is red color because tiny vessels are visible. The correction can be made with Nd:YAG lasers long pulse.Combination of treatment can be made, sometimes it's not only one entity, two or three conditions can be done together, mixing treatments.You can use any cosmetic method and try to correct it. The industry involved produce one billion dollar yearly. Why?, because there are many causes, not one. The diagnostic is wrong, and you can try with all the creams you find, endlessly.In conclusion: the dark circles’ elements involved are: 1) skin hyperpigmentation, 2)skin contraction due to lack of filling, 3)fat absence between skin and orbicularis muscle, and 4) visible blood vessels. And any mix can happen.
What color are your eyes?
My eyes are good ol’ brown!There they are, in all of their glory.In person (and without camera flash) they don’t look as yellowish on the outsides, but more of a warm brown with darker brown in the middle.Please excuse my wild and untamed eyebrows…They pretty much maintain the same coloring at all times, though when sunlight shines through them, they take on a lovely warm, golden color.Even though brown eyes are quite common, I’ve grown to love and embrace mine. They’re pretty awesome!
Why do Puggles have blue eyes?
My Puppy Puggle of 5 months has cool blue eyes, while my other dogs(border collies) have a red tinge to their eyes which I thought was normal of all dogs. I am curious as to why a puggle's, or mabey some other breeds', are glowing blueish.
How do I get rid of blue around my eyes?
Ok, I dont have bags under my eyes, its just blue under my eyes. Its almost all around my eyes, in the corner, and mainly under my eyes. Very noticeable. What is the reason for this? But, how can I get rid of them, quickest way? It may be lack of sleep... but I usually sleep 8-9hrs so I dont know, please help.
Rabbit with two different coloured eyes?
Your rabbit looks like a Dutch mix. :) She is a very beautiful rabbit. There is one thing that comes to mind: When I went to a rabbit show, I almost bought a Dutch doe but was told not to by an experienced breeder because that doe was out of a brother/sister accidental breeding and all of the babies she threw had one blue eye and one brown eye. So the brother/sister breeding brought out a very recessive trait. It is not very common in rabbits (very rare, actually). I doubt anything is wrong with her. Rabbit eyes don't change color when they lose vision. Instead, their cornea becomes cloudy and they can get cataracts. I used to have a chocolate tan doe that had very dark brown eyes with bright white/cloudy cataracts, it was kind of creepy but she got around just fine even though she was blind. One last note - you say that her right eye is dark brown with a reddish tinge to it, that is known as a ruby glow in show rabbits. Some chocolate varieties have a ruby glow. Your doe looks like she has some chocolate in her. I'm not sure what exactly color she is, kind of looks like a very dark chocolate tortoise or possibly some siamese in her. Either way, she's a very beautiful rabbit!
Why do colors look slightly different when viewed out of each eye separately?
The cornea and lens, although they help us see greatly by focusing light from different distances, also filter out some wavelengths of light. (In particular, the cornea filters light, such as high frequency UV light, which would damage the lens. It also provides something like 70% of the eye's focusing power.)Transmission of high frequency light varies across the cornea: http://www.cell.com/biophysj/abs...I'm not sure whether this variation in light transmission comes as a result of changing composition or thickness of the cornea, but it does exist. Similar variation between corneas could also result in different spectra of light reaching the retinas.As an extreme example of this, the artist Claude Monet had cataract surgery that essentially removed the cornea of one of his eyes. As a result, he became sensitive to higher frequency light, possibly even the low end of the UV spectrum (though we cannot know for sure as no one actually did any tests). This pair of paintings is sometimes cited as evidence that he became more sensitive to blue light:Of course, it's possible that he just felt like using more blue paint in those days...However, we still do cataract surgery these days, and we can do actual testing. A man named Alek Komarnitsky received such a surgery in 2011, in which his right lens was replaced with a synthetic alternative. He documents his newfound ability to see into the near-ultraviolet here: Ultra Violet SUPERPOWER (!) after Cataract Surgery with CrystalensAs you'll see on that page, Alek is now able to see light with wavelengths all the way down to 350nm. In daylight, things that others see as glossy black, he sees as slightly violet:So what it comes down to is this: the retina is able to process light at wavelengths much shorter than the cornea and lens transmit. If variation in these organs permits the passage of shorter wavelengths, the world will look a little more blue.So what could account for red and green tints? There are a lot of things: different concentrations of L or M cone cells in the retina, different arrangement of blood vessels over the retina, even differences in the natural yellowing of the lens over time. You'll never be sure what's going on without having someone with a lot of instruments take a very close look inside your eyes.