Screen Time Pros and Cons
It is the electronics generation. Whether it is homework, email, gaming, chatting with friends, searching the web or watching Youtube, kids these days seem to have an endless number of reasons to be glued to a screen. Drs. Leong, Bui and Yan are frequently asked how bad this can be for their kids and whether they should be limiting screen time.
Use of digital devices is almost unavoidable for several purposes such as educational, social or providing a needed break. However, studies show that excessive screen time can have behavioral consequences such as irritability, moodiness, inability to concentrate, poor behavior, and other issues as well. Too much screen time is also linked to dry eyes and meibomian gland disorders as people blink less when concentrating on viewing screens. Computer vision syndrome also includes eye strain and irritation, headaches, back or neck and shoulder pain, and sleep disturbances. Some of these computer vision syndrome symptoms are attributed to blue light that is emitted from the screens of digital devices.
Blue light is a short wavelength, high-energy visible light that is emitted by digital screens, LED lights and the sun. Studies suggest that exposure to some waves of blue light over extended periods of time may be harmful to the light-sensitive cells of the retina at the back of the eye. When these cells are damaged, vision loss can occur. Research indicates that extreme blue light exposure could lead to macular degeneration or other serious eye diseases that can cause vision loss and blindness. Studies show that blue light also interferes with the regulation of the the body’s circadian rhythm which can have a disruptive impact on the body’s sleep cycle. Lack of quality sleep can lead to serious health consequences as well. Young children are particularly susceptible to blue light exposure as the transparent crystalline lens in the eye does not filter much blue light.
How to Protect the Eyes From Blue Light
The first step in proper eye protection is abstaining from excessive exposure by limiting the amount of time spent using a computer, smart phone or tablet - especially at night, to avoid interfering with sleep. Many pediatricians recommend zero screen time for children under age two years of age.
The next step would be to reduce the amount of blue light entering the eyes by using blue light blocking glasses or coatings that deflect the light away from the eyes. There are also apps and screen filters that you can add to your devices to reduce the amount of blue light being projected from the screen. Speak to your eye doctor about steps you can take to reduce blue light exposure from digital devices.
As a side note, the sun is an even greater source of blue light so it is essential to protect your child’s eyes with UV and blue light blocking sunglasses any time your child goes outside - even on overcast days. While the effects (such as increased risk of age-related macular degeneration) may not be seen for decades later, it’s worth it to do what you can now to prevent future damage and risk for vision loss. An eye exam with Drs. Leong, Bui and Yan can provide a more specific recommendation on ways to reduce risk of screen time for your family.