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Eye color pigments only vary from light brown to black. No green or blue pigments contribute to eye color. The variations you see in blue, green and hazel eyes are produced through not only a lack of dark pigmentation in the stroma but also the presence of Tyndall scattering, Rayleigh scattering and selective light absorption of certain biological molecules like hemoglobin - all this results in blue light being reflected more than red light. Kind of a cool optical trick.With blue eyes, the iris is pigmented and the stroma lacks pigmentation. Green eyes result from similar pigmentation in the iris but some light brown pigments in the stroma. Hazel eyes result from significant brown pigmentation in the iris' anterior border layer and light brown pigments in the stroma. Brown eyes contain larger amounts of pigmentation (melanin) in the stroma. A lack of pigmentation in both the stroma and iris, Albinism, produces red or violet eye colors. In summation, eye color is limited because humans only have brown pigmentation. Diversity results from the brown pigmentation range (amber to black), various distributions of pigments between the stroma and iris and Tyndall scattering in the stroma. Eye color is a polygenic trait. At least six genes are known to contribute to eye color phenotypes through at least 41
Ok, I can see that you would like to get something to protect your eyes from those harmful radiations, and it is true those glasses are called radiation protective glasses, which could resist a lot of radiation from computer screens. Indeed there are many options out there for you. However, I would like to recommend Black Wraparound X-ray Radiation Protection Lead Glasses to you, which is of great quality and price. Hope you find them amazing, they are available at Amazon.
According to MayoClinic.com, puffy eyes or swelling eyelid are typically a temporary condition that can be easily alleviated by various home remedies. You may find swelling eyelid after you get up from bed. This is caused by the way you sleep. I hears that lying flat while sleeping allows fluid to collect beneath the eyes. So, when you sheep, you shall elevate your head with a couple of pillows.
YES, it is just that type. Lenses for astigmatism ( toric lenses) are all like that. I think they are more easy to wear than regular soft contacts as they are harder in the middle part.
There are several styles of sunglasses for women are in fashion this year. First of all, you can choose some vintage sunglasses. As we know, retro fashion is very popular now and it is quite fashionable to have a pair of retro sunglasses. Secondly, the color factor is also quite important. This year, fluorescent color is very trendy and so do the style of color block. What's more, some sunglasses that are made of different material or in patchwork are also good choices. There are many brand stores and popular websites selling these fashionable sunglasses. You can definitely have a try. Hope this will help you.
You can clean each affected eye with a warm, wet cloth; then apply a cold compress. ask your doctor prescribe antibiotic eye drops for bacterial infections.
Oh, you can not fix your sunglasses lenses with the fire. In that way, you will damage your lenses seriously and you can not use it any longer. I have not heard that the sunglasses can be fixed with fire. So you need to take it to the store to see whether it can be fixed or not, or you need to buy a pair of new one.
There are four aspects you should notice when choosing swimming goggles: 1.Optical performance and medical standard.As the refractive index of water is different from that of air, if the surface of the swimming goggles is uneven it is like wearing convex lens or concave lens, which will cause damages to your eyes over time, thus affects your vision. 2.Comfort.The swimming goggles shall be designed to conform to the principles of Ergonomics. 3. Antifogging performance
Well, it is possible for your eyes to have swelling because of eye stye. First, you should know that a stye is inflammation of the eyelid, usually inside one of the small glands lining the eyelid. And for the causes, most of styes are caused by infection from bacteria. And when it occurs, it will just have some other symptoms, such as puffy eyes, even swelling eyes. And that is why you have swelling eyes. And at this moment, you should make sure your eyes are far from the bacteria. Also, having some cool tea bags can be effective.
Vision testing is a more comprehensive set of eye tests than simple vision screenings and is performed by an eyecare professional in a controlled office setting with vision testing equipment that goes far beyond what's available at a typical vision screening. There are a lot of types of vision testing for you to get your eyes examined. If you want to know the exact vision testing you need to have, you should consult your eye doctor.
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