The Screens can affect people’s health Especially those cellphones which are used more and more intensively. However, not all concerns are usually aggravating cellphones Based on scientific evidence.

And it is that nowadays people spend whole hours on screens for work, leisure and routine. Questions about its possible health effects have been raised for years, but not all of them have yet been answered.

Therefore, according to the statements of Sergio Augusto Mello, Optometrist of the Student Health Unit of the Directorate of University Welfare of the National University of Colombia (UNAL) in Infobae, the questions will be answered in such a way that Readers consider when using them devices.

Exceeding the distance is the main factor

Augusto Mello points out that visible light, which is perceived, consists of bands or rays of different colors. This value is measured in wavelengths, where The shortest wavelength is the wavelength that contains the most energy.

“Blue light is the range of the visible light spectrum generally recognized as having wavelengths between 400 and 495 nanometers (nm). A typical tone description is violet between 400 and 450 nm; Blue, around 470 nm, and bluish green, between 480 and 495 nm. Shorter wavelengths, including 400 to 450 nm, have more energy, with 400 to 425 nm being the highest,” he explains.

He adds that “the human eye can only distinguish radiation between 400 and 700 nm, below 400 nm we enter the ultraviolet range and above 700 nm into the infrared region. A proportional mixture of all wavelengths between 400 and 500 nm makes up white light.

Explain that the eye focuses incoming light rays to form an image on the retina; In the process, it focuses light, increasing the energy density on the retina, which affects the amount of radiation that reaches it.

According to experts, wavelengths in the transition region between ultraviolet and visible light (below 380 nm) They penetrate deeper into the eye environment to reach the retina and activate eye receptors.

Blue light really damages the eyes

blue light High-energy shortwave from 415 to 455 nm is the most damaging. Optometrist Mello explains: “The absorption of the lens causes its opacity (cataract) and the direct penetration of the lens into the retina causes irreversible photochemical damage to the retina.”

He also notes that eye discomfort associated with blue light is becoming more frequent, “because due to the short wavelength of blue light, the focus is not in the center of the retina, but in its frontal part, so the time is prolonged. Exposure to blue light causes visual fatigue and worsening of myopia.

Also symptoms like Double vision and inability to concentrate can affect school and work.

The extent of the damage is related various factors, What:

– the intensity of blue light received by the eye.

– Lighting distance.

– the direction of the line of sight.

– and the spectrum of the light source.

Recommendations for eye care

– Activate device filters to reduce blue light emissions.

– Use protective filters on corrective lenses to minimize blue light and improve vision.

– Maintain a working distance to ensure enough space to view screen content properly.

– Balance natural and artificial ambient lighting.

– Use eye lubricants to keep the eye surface healthy.

– Relax: leave the device, walk and look at a distant point that helps reduce visual, physical and mental stress.

Continue reading