FLASH NEWS
Why does the color of the baby's eyes change? Here is how it is explained
2022-09-30 12:00:10 / JETË
Studies show that the change in eye color in babies depends a lot on the color they are born with.
A study led by Cassie Ludwig, an ophthalmologist at the Byers Eye Institute at Stanford University, tracked 148 babies born at Lucile Packard Children's Hospital in California, recording the color of their irises at birth.
Nearly two-thirds of babies are born with brown eyes and one-fifth with blue eyes.
Two years later, Ludwig and her colleagues found that of the 40 blue-eyed babies in the study, 11 had changed to brown eyes by age two, three had turned hazel and two had turned green.
Of the 77 newborns with brown eyes, almost all (73) still had brown eyes at age two.
So it seems that blue eyes are more likely to change than brown eyes during the early stages of our lives. But why?
One clue lies in the fact that when babies' eyes changed color, they tended to get darker, not lighter.
In Ludwig's study, a third of the babies' eyes changed color in the first two years, with the most common change being that the eyes became darker.
Only five of the 148 children in the study (3.4%) had eyes that became whiter with age.
The tendency toward darkening may be due to the accumulation of a protective pigment in the iris.
Such a relatively common and healthy color change is mostly limited to early childhood.
Në një studim tjetër në SHBA, i cili gjurmoi më shumë se 1300 binjakë nga foshnjëria deri në moshën madhore, ngjyra e syve zakonisht nuk ndryshonte më në moshën gjashtë vjeç, megjithëse në disa raste (10-20% e atyre të studiuar), ajo vazhdoi të ndryshonte gjatë adoleshencës dhe në moshën madhore.
Në mesin e binjakëve jo-identikë, ngjyra e syve kishte më shumë gjasa të ndryshonte në jetën e mëvonshme sesa midis binjakëve identikë.
Kjo sugjeron një element gjenetik për prirjen për të ndryshuar ngjyrën e syve, vëren David Mackey, profesor i oftalmologjisë në Institutin Lions Eye në Universitetin e Australisë Perëndimore.
Although the data is limited and was conducted in only one country, the US, changes in eye color appear to be most common among people of Northern European, Pacific Islander or mixed race heritage.
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