Arcus senilis is very common as people get older. This is likely because blood vessels in your eyes become more open with age and allow more cholesterol and other fats to leak into the cornea. About 60 percent of people ages 50 to 60 have this condition.
In most people, the answer is no. Eye color fully matures in infancy and remains the same for life. But in a small percentage of adults, eye color can naturally become either noticeably darker or lighter with age.
As previously mentioned, exposure to light causes your body to produce more melanin. Even if your eye color has set, your eye color could slightly change if you expose your eyes to more sunlight. As a result, your eyes might appear a darker shade of brown, blue, green, or gray, depending on your current eye color.
Laser lightening of eye color With the help of a laser, melanin cells are destroyed making irises become lighter. This means that people with brown eyes can become blue-eyed or gray-eyed.
This is because eye color is determined by your genes and the melanin level on your body. As you grow up, the melanin level increases around your pupil, making the eye darker. However, 10-15% of Caucasian eyes change to a lighter color as they age, as pigment in the iris changes or degrades.
Medical Definition of Blue sclera Blue sclerae are characteristic of a number of conditions, particularly connective tissue disorders. These include osteogenesis imperfecta, Marfan’s syndrome, Ehlers-Danlos syndrome, pseudoxanthoma elasticum, and Willems De Vries syndrome, among others.
The production of melanin in the iris is what influences eye color. More melanin produces a darker coloring, while less makes for lighter eyes. Green eyes are the rarest, but there exist anecdotal reports that gray eyes are even rarer. Eye color isn’t just a superfluous part of your appearance.
Close to 3% of the world’s population have gray eyes. People with gray eyes have little or no melanin in their irises, but they have more collagen in a part of the eye called the stroma. The light scatters off the collagen in a way that makes the eyes appear gray.
Blue or gray, which occurs when someone has no pigment (melanin) in the front layer of the iris. Around 1 in 4 people in the U.S. have blue eyes. Brown, which is the most common eye color in the world. Green, which is the least common eye color.
Blue eyes are indeed becoming less common in the world. One study showed that about 100 years ago, half of U.S. residents had blue eyes. Nowadays only 1 in 6 does. In the past, blue-eyed people tended to have kids with other blue-eyed people.
Because blue eyes contain less melanin than green, hazel or brown eyes, they may be more susceptible to damage from UV and blue light.
The only way to present blue eyes is to inherit two copies of the blue-eyed gene. However, brown-eyed parents can pass a recessive blue-eyed gene. Therefore, two brown-eyed partners can birth a blue-eyed baby. Brown eyes + blue eyes = 50% chance of blue eyes, but only if the brown-eyed parent carries a blue-eyed gene.
They are also fairly uncommon among the masses! It has been estimated that only 8% of the world’s population has blue eyes. Going by the math, this means only 56 million people have some shade of blue as an eye color. There are only a handful of celebrities who have blue eyes and even a smaller number who are male.