Eye color interferes with vision? Understand if there is relationship

When it comes to eye health, one of the main doubts revolves around a possible interference of eye color in vision. After all, is it myth or truth that the tone can change the quality of the view?

In conversation with CNN the ophthalmologist Tiago César Pereira Ferreira explains that Eye color does not directly affect visual acuity i.e, does not make the vision better or worse . However, the lighter eyes have a fewer melanin in the iris, which may influence light sensitivity and the risk of certain eye diseases.

“This lower protection can increase retinal exposure to ultraviolet radiation (UV), raising the risk of pathologies such as age -related macular degeneration (DMRI). Therefore, while eye color does not influence the sharpness of vision, it can interfere with the way light is perceived and eye protection against environmental damage, ”he says.

Lighter eyes are more sensitive to light

According to the expert, the sensitivity to light, known as photophobia is more common in people with clear eyes Due to the smaller amount of melanin in the iris, which acts as a natural filter regulating the amount of light that enters the eye. “In dark eyes, the largest concentration of this pigment absorbs more light, reducing shine and discomfort. Already in clear eyes, there is less blockage of light, which allows greater penetration of light rays to the retina, ”he says.

“This can cause greater sensitivity to intense clarity, especially in very lit or outdoor environments on sunny days. In addition, this lower natural protection can increase the risk of retinal injuries caused by prolonged exposure to ultraviolet radiation, making the use of sunglasses an important recommendation for people with light eyes, ”he details.

But after all, what defines the color of the eyes?

Eye color is genetically determined, mainly by OCA2 and HERC2 genes, which control the quantity and distribution of melanin in the iris.

“Melanin is the pigment responsible for defining the shade of the eyes: brown eyes have a high concentration of melanin, while blue eyes result from a low amount of this pigment. Intermediate colors, such as green and honey, occur due to a variable distribution of melanin and the interaction of light with the structure of the iris, ”he explains.

Genetics, according to the professional, is complex and involves multiple genes, which explains why children of parents with different colors eyes can inherit varied combinations. “In addition, eye color perception can change according to lighting, because the way light interacts with the iris can give the impression of different tones under certain conditions,” he adds.

Can eye color be changed throughout life?

Lucas says yes, Eye color may change in some situations . “In newborns, especially those with light-skinned, it is common for the eyes to have a blue-blue color at birth due to the low production of melanin. Over the months, iris pigmentation increases and the definitive color is established around 12 to 24 months of age, ”he says.

“Already in adulthood, Changes in eye color are rare but may occur due to factors such as trauma , Ocular Diseases if Use of certain medicines like those for glaucoma treatment that can darken the iris, ”he comments.

There are also surgical or laser procedures that can artificially modify eye color, such as artificial iris implants or iris depigmentation, but these techniques are still controversial and may be risks, such as inflammation and increased intraocular pressure.

Factors that can make the eyes more sensitive

Different factors can enhance eye sensitivity, going beyond exposure to intense light. Among them is dry eye syndrome, as deficiency in tear production or quality can generate irritation and discomfort, making the eyes more sensitive to environmental factors.

“Eye allergies may also increase sensitivity, itching, redness and greater response to stimuli such as wind and pollution. Ophthalmological procedures, such as refractive surgery and cataract surgery, can generate temporary photosensitivity until the recovery is complete, ”says Tiago.

Excessive use of digital screens is another important factor, as prolonged exposure to the blue light of cell phones and computers can lead to eye fatigue and increase sensitivity perception. Ocular diseases such as uveitis, keratitis and conjunctivitis can intensify eye response to light and other stimuli.

How to keep your eyes healthy and protected?

Maintenance of eye health depends on a series of daily preventive care. See below the basic care:

1. The use of UV -protected sunglasses is critical to avoid damage to the retinal and lens, preventing conditions such as early cataract and macular degeneration;
2. Proper eye lubrication, whether by frequent flashing or the use of artificial tears, helps to avoid dryness and eye irritation;
3. Avoiding scratching the eyes is another essential care, as this habit can cause microlesions in the cornea and increase the risk of keratoconus development;
4. A diet rich in antioxidants such as vitamin A, lutein and omega-3 contributes to the protection of retinal and the prevention of degenerative eye diseases.
5. It is indispensable to perform periodic ophthalmic consultations to early detect conditions such as glaucoma, cataract and refractive errors, ensuring proper monitoring of visual health throughout life.

Was this content originally published in eye color interferes with the vision? Understand if there is relationship on the CNN Brazil website.

Source: CNN Brasil