why do your eyes change color as you age
By Eye color often is the genetic trait that fascinates parents the most as a child develops. Will the child's eyes be black, brown, blue, gray, green, hazel or some combination of colors? How a child looks depends on the genetic material each parent contributes to the child. But the parents' genes can mix and match in many different ways. The influences from each parent aren't known until в surprise в after the child is born! The colored part of the is called the, which has pigmentation that determines our eye color. Human eye color originates with three genes, two of which are well understood. These genes account for the most common colors в green, brown, and blue. Other colors, such as gray, hazel and multiple combinations are not fully understood or explainable at this time. We used to think of brown being "dominant" and blue being "recessive. " But modern science has shown that eye color is not at all that simple. Also, eye colors don't come out as a blend of the parents' colors, as in mixing paint. Each parent has two pairs of genes on each. So multiple possibilities exist, depending on how the "Wheel of Fortune" spins. Dutch researchers have announced they are working on ways to determine eye color of adults with sophisticated DNA analysis that can predict with 90 percent accuracy whether people have brown or. In May 2010, the same researchers said they were closing in on the ability to more accurately predict even variable eye colors via DNA analysis and new understanding of how genetics govern eye color.
Researchers said these discoveries also have implications for forensic investigations at crime scenes where recovered DNA may give clues about the actual appearance of suspects. Most babies are born with blue eyes that can darken in their first three years. Darkening occurs if, a brown pigment usually not present at birth, develops with age. Children can have completely different eye colors than either of their parents. But if both parents have, it's most likely that their children also will have brown eyes. The darker colors tend to dominate, so brown tends to win out over green, and green tends to win out over blue. However, a brown/blue parent mix doesn't automatically produce a brown-eyed child. Some children are born with irises that don't match in color. Usually this is caused by faulty developmental pigment transport, local trauma either in the womb or shortly after birth or a benign genetic disorder. Other causes can be inflammation, freckle (diffuse nevus) of the iris and. Having an early is important to make sure nothing serious is going on в and "nothing serious" is the most common finding. The iris is a muscle that expands and contracts to control size. The pupil enlarges in dimmer lighting and grows smaller in brighter lighting. The pupil also shrinks when you focus on near objects, such as a book you are reading. When the pupil size changes, the pigments in the iris compress or spread apart, changing the eye color a bit. Certain emotions can change both the pupil size and the iris color.
That's why some people say their eyes change colors when they're angry or loving. Eye color also can change with age. This happens in 10 to 15 percent of the Caucasian population (people who generally have lighter eye colors). For instance, my once very brown eyes are now hazel, a combination of brown and green. However, some
actually get darker with age. Note that if your adult eye color changes pretty dramatically, or if one eye changes from brown to green or blue to brown (called ), it's important to see your. Eye color changes can be a warning sign of certain diseases, such as Fuch's heterochromic iridocyclitis, Horner's syndrome or pigmentary. Ultimately, if you don't like the eye color you inherited, you can always change it with. But remember, even colored contact lenses are a prescription medical device and must be prescribed and monitored by an eye doctor. Don't buy them over the Internet or get them from a friend without having an eye doctor's prescription! If you wear eyeglasses, be sure to choose lenses with. AR-coated lenses eliminate annoying reflections in your glasses that prevent others from seeing the beauty and expressiveness of your eyes. Ask your optician for details and a demonstration. Also, read about that highlight and enhance the color of your eyes and skin tone. Page updated May 14, 2018 Editor's Note : Our previously hazel-colored eyes have changed to green, light green at that. We asked our Optometrist, Nina Margolis, O. D. , to explain for why this was happening. We have also added a link to the National Institutes of Health article entitled, Your Aging Eyes. by Many people want to change something about themselves, such as improving their looks, their mind, their future.
The question, "Can I change my eye color? ", was posed to me recently. As an optometrist I was surprised and, at the same time, yet not. Eye color does change sometimes in our lives, so why not try to control it? Here are some facts about eye color Eye color is based on the number and color of pigment granules (melanin) in our eyes. Newborns often have non-pigmented (blue) eyes, which will change and darken in the first six years of life. More or darker pigment means darker eyes, fewer or lighter granules result in lighter eyes. Hazel eyes can appear to change color, due to less pigment and more effect of the exterior environment. Eye color can change with puberty, likely due to a genetic component. There may be environmental factors that affect eye color. One study states that 10 15% of Caucasian eyes change color as they age. Other races have darker eyes, which do not change significantly with age. As pigment in the iris changes or degrades, the eye color usually lightens. However, hazel or blue eyes can darken. Slight color changes are a normal and harmless part of the aging process, but dramatic changes may indicate an underlying health problem. Ocular diseases which can cause color change are, and. As with most diseases, they are best caught early, as damage is most often irreversible. A visit to the eye doctor is recommended.
Once ocular disease is ruled out, how can one change their eye color? I found several interesting options, several of which were novel. Soft contact lenses can temporarily change eye color. Be advised that contacts are a foreign object to the eye and can cause discomfort and serious complications; fitting and evaluation by an eye specialist is necessary. Hypnosis has been reported to change eye color. There have been reports of multiple personality disorders causing the iris to change color. Herbal eye drops reportedly can change eye color, similar to skin and hair lightening herbs. A colon/liver cleanse and a raw food diet reportedly may lighten or brighten the iris eye color. There is also an eye surgery to implant a colored lens ( ). This procedure is currently being performed in Panama City, Panama, is quite expensive and not FDA approved. The long term effects are not known. However, it is a reversible procedure. Lastly, there is a new procedure being developed similar to, involving laser surgery to destroy iris pigment. This will lighten the eye color, but it is irreversible, and again long term effects are not known. All in all, there are options available to change one's eye color, ranging from diet to expensive surgery. If one is "lucky" enough to have hazel eyes, eye color may change naturally. Your eyes may lighten as you get older, or you may change eye color by artificial methods. Just remember, long term effects are not known; the most important factors are health and good vision. 2011 for
- Views: 42
why do your eyes change color when you cry
why does eye color change with mood
why does eye color change in adults
why do we have different hair colors
why do we have different coloured eyes
why do we have different coloured eyes
why do we have color in our eyes