It is almost impossible to avoid interaction with technology today.  Our children are exposed to smart phones, tv’s, laptops, smart watches, iPads, LeapPads, other pads, and gaming systems just about every awake hour of every day of their lives, starting from infancy. As parents, we know it is wrong, but yet, the blue light draws us all in.

Children between the ages of two and 18 spend an average of five-and-a-half hours (or more) a day at home watching television, playing video games, surfing the Web or using some other form of media

Brain growth occurs at a rapid rate.  From birth, an infant already has all of the neurons he will ever have, but the synapses are forming based on nourishment and environment. Synapses are the relays over which neurons communicate with each other and are the basis of the working motherboard of the brain. Already more plentiful than an adult’s at birth, synapses multiply rapidly in the first months of life. A 2-year-old has about half as many synapses as a grown adult. They continue to form throughout childhood, into the teenage years, and complete development around age 25.

A few facts we know to be true about the development of the brain:

  • Environmental exposures influence brain development.
  • As the brain develops, the fibers connecting nerve cells are wrapped in a protein that greatly increases the speed with which they can transmit impulses from cell to cell. The increase in connectivity shapes how well different parts of the brain work at the same time. Research is finding that the extent of connectivity is related to growth in intellectual capacities such as memory and reading ability.
  • Many hormonal changes take place during puberty. Reproductive hormones play a role in behavior and stress hormones have compound effects on the brain.
  • The part of the brain involved in emotional responses changes during the teen years.
  • An adolescent brain peaks in its ability to absorb and learn well before adulthood. The amount of information it can hold will never be larger than this stage.
  • Sleep, or lack of it, plays a huge role in brain development.  Sleep deprivation and fatigue attributes to difficulty maintaining attention, irritability and depression. Studies of children and adolescents have found that sleep deprivation can increase impulsive behavior. Sleep is imperative for proper physical and emotional health.

Did You Know?

21% of children under the age of 2 have a television in their bedroom, by the age of 8, over 50% of children have one.  This does not include other media devices.

The amount of time spent in front of blue-light media devices at 2 years of age is linked with academic, social and health problems by age 10:

  • Less engagement in classroom activities
  • Less exercise
  • Less sleep, poorer sleep quality
  • Increased bullying statistics
  • Poor food consumption
  • Increased obesity


The average amount of reported time a 2-year-old spends exposed to blue-light media each day averages around 90 minutes. Again, that is the reported average, not the actual. I would assume the numbers are much higher. The American Academy of Pediatrics recommends children under 2 watch no TV, and children over age 2 watch no more than 2 hours per day.  For every hour beyond this mark, the rate of the above mentioned problems increases.

As children enter school, those who utilize the internet during class cannot recall the information being taught nor do they perform as well on a test of the material as those who are not exposed to media. Research proves that reading books, not screens, develops reflection, critical thinking, problem solving, and vocabulary.

Not only is increased screen time effecting learning and brain development, potentially stunting both, but exposure may be causing permanent eye damage. Unlike digital eye strain, the effects of blue light media add up over time and can lead to eye diseases like macular degeneration. Children are at a higher risk than adults because their eyes are still developing, and they don’t yet have the protective pigments in their eyes to help filter out some of this harmful blue light.

I know that this is all scary, and yet common sense at the same time.  We live in a time of technology, and our children should be included so they are not surpassed, but there is so much to be aware of before handing over a device and walking away. Notice body positioning as devices are used.  Joints can be effected by prolonged media usage, effecting posture and causing many chronic problems.  I see it all too often in my practice!

The bottom line, follow the guidelines of zero exposure before age 2 and limit to under 2 hours a day afterward. It may be an easy babysitter.  It may even provide educational purposes, but there are consequences to the exposure.

teenager with tablet while lying on the floor in the room



Please take the time to watch this TedTalks: