Hooked on our smartphones, we lose track of time as our thumbs scroll through effortless, endless, and entertaining content feeds. Meanwhile, the several-inch screen quietly emits blue light and waves of electromagnetic fields (EMFs). We may not notice these constant influences, but our minds and bodies do.
Bright Screens, Blurry Eyes
Smart screens emit a combination of red, green, and blue light. Within this spectrum, they emit a notable “blue light spike” in the 400-to-490 nanometer range, also known as high-energy visible (HEV) light.Our eyes can’t completely filter out HEV light, so it passes through the eye and penetrates to the retina—the light-sensitive layer at the back of the eye.
EMF Overload, Tired Ears
People who frequently use cellphones from a young age may develop hearing loss comparable to that usually seen in people in their 70s, Dr. Naresh Kumar Panda, an ear, nose, and throat specialist who has studied the effect of cellphone use on hearing, told The Epoch Times.Multiple studies have evaluated the impact of cellphone radiofrequency electromagnetic radiation (EMR) on the ears. When talking over a cellphone, the ear, the auditory nerve, and a portion of the temporal lobe absorb radiofrequency EMR.
Radiofrequency EMRs are the radio waves that connect your phone to a cell tower. These waves can penetrate body tissues, produce heating effects, and stimulate the auditory system—even in the absence of sound.
Long-term cellphone use—even if just one hour of phone calls per day—could harm hearing and desensitize the ears to sound, Panda said. Bluetooth devices are “equally damaging.”
Auditory threshold shifts may be temporary if the exposure is not too severe, but damage to the auditory system could be permanent with long-term exposure, he added. However, more research is needed to understand this in depth, he said.
Distinct Metabolites, Strained Heart
Our handheld devices harm more than what lies above the shoulders—their effects travel down into other organ systems.
Dr. David Horner, the lead author of the study, called the distinct pattern of blood metabolites a “biological fingerprint” of screen time. He told The Epoch Times that many of the same metabolites have been identified in previous studies for obesity and cardiometabolic disease, suggesting that the screen time “fingerprint” may represent an early stage of similar risk pathways.
The analysis found that each additional hour of recreational screen use per day was linked to a measurable increase in cardiovascular risk scores. While the numbers may seem small for a single hour, the effects accumulate: A child with three extra hours of daily screen use would have roughly a quarter to half higher risk score than their peers with less screen time, he said.
Multiplied across a whole population, we would see a “meaningful shift in early cardiometabolic risk that could carry into adulthood.”
Faulty Posture, Strained Spine
Lost in a phone screen while lounging on your couch can hurt you even further—right down to your bones.There are a variety of “text” diseases.
His condition worsened to the point that he could hardly keep his head up for only a minute. An X-ray examination revealed an abnormal forward curve of the neck (the yellow line), misaligned vertebrae (the red arrows), and arthritic degeneration in neck joints (white arrows). After more than three months of reduced screen time and posture correction exercises, his symptoms substantially improved.
Digital Waves, Disrupted Fertility
Multiple studies have found that exposure to radiation from digital devices, including cellphones and laptops, is associated with reduced sperm motility, viability, and concentration—key predictors of male fertility.The results showed that progressive sperm motility—sperm moving forward in a relatively straight line—was reduced to 19.5 percentage points after exposure to devices such as smartphones and Wi-Fi networks compared to controls. Their immotile sperm increased by 10 percentage points.
The Cancer Risk
The possibility of developing cancer due to cellphone radiation exposure remains controversial, with research providing mixed results and no clear consensus to date. In 2011, the World Health Organization’s International Agency for Research on Cancer classified radiofrequency electromagnetic fields as “possibly carcinogenic to humans,” noting limited evidence.The Mental Toll
Excessive screen time can also affect brain function and reduce gray matter volume, especially in areas responsible for inhibitory control, decision-making, and emotional regulation.Gadi Lissak, a clinical and behavioral medicine psychologist, told The Epoch Times that such structural changes, found in various brain imaging studies, mimic the addictive behavior seen in substance abuse. Such neural changes can make it harder for people to filter out distractions and focus on their goals, further affecting their emotional processing and contributing to increased neuroticism and impulsivity.
“In the largest studies, teens who are heavy users of social media are nearly twice as likely to be depressed as non-users,” Jean M. Twenge, a professor of psychology at San Diego State University and author of the book “10 Rules for Raising Kids in a High-Tech World,” told The Epoch Times. Such a risk is not a small number for parents, she said.
In preschool-and school-aged children, high screen exposure has been associated with attention difficulties.
He spent most of his time playing video games on his PlayStation, computer, or smartphone, averaging more than seven hours on weekdays and even more on weekends. He was put on methylphenidate, but the drug apparently caused him to become underweight.
Seeking an alternative, Mark’s parents enrolled him in a behavioral program in which he was put under a screen time reduction plan. Mark began showing improvement within two weeks. At week 11, his condition had significantly improved, and he no longer met the ADHD diagnosis.
Lissak, the author of the review, followed Mark after the intervention. He told The Epoch Times that Mark hasn’t been diagnosed with ADHD-like symptoms again.
Problematic screen use is also found to result in suicidal behaviors. A 2023 study involving more than 11,000 U.S. children, aged 9 to 11, found that each extra hour of screen time per day was associated with a 9 percent higher risk of suicidal ideation and attempts.
The odds of experiencing suicidal thoughts and behaviors were 36 percent higher for texting, 30 percent for video chatting, 21 percent for watching videos, and 18 percent higher for playing video games.
The Cure
Despite extensive scientific evidence associating screen time with health risks, digital technology has already penetrated every corner of society.“Because everyone uses it, everyone is affected by it,” Kishore PV Reddy, a senior machine learning engineer whose work focuses on training AI models, told The Epoch Times.
Panda suggests holding phones at arm’s length while reading or watching videos, or using speaker mode during long calls to reduce radiation impact, and not keeping them near pillows or beds while sleeping.
What’s most important, fundamentally, is to cut the source—reduce screen time.
“We can’t tell people to stop using cellphones but to use them judiciously—using them only when absolutely required,” Panda said.
For kids, Twenge advises delaying giving them their own devices for as long as possible. “No parent, educator, or developmental expert would say that 13, at the beginning of puberty and during middle school, is the right time to introduce social media,” she said—as children and younger teens are more vulnerable. Thirteen is the minimum age for kids to use most social media platforms in the United States.
Alternatively, use a basic phone instead of a smartphone. This works for adults too, but they can get two phones —one for work, one for home—the latter with only text messaging and call-making capabilities.
Experts recommend replacing screen time with engaging alternatives.
For Reddy, who works long hours on screens throughout the week, striking a balance between on-screen and off-screen activities is an important first step toward healthier living in the digital age.
“Practicing meditation, reading physical books, playing a musical instrument, taking on challenging tasks, or simply going for a walk can all help you,” he said.
