Limit Screen Time: How Digital Exposure Affects Kids’ Vision

In our increasingly digital world, parents constantly battle the existence of glowing screens against the nagging worry about their children’s well-being. While we appreciate the educational and entertainment value of technology, the question looms: How much is too much? And specifically, what’s the impact on those precious, developing eyes?

As parents raising children in a digital era, we’re right to be concerned.

Also Read: Is Too Much Screen Time Ruining Our Kids' Eyesight? 9 Questions A Techie Dad Asked An Eye Doctor

Does screen time affect vision?

The short answer is yes, but not in the way many people think. Prolonged screen time doesn’t directly alter the structure of the eye in a way that causes long-term vision problems but it is rather a contributory factor. It significantly contributes to digital eye strain, also known as computer vision syndrome. According to a study, it is a common condition caused by prolonged exposure to computer screens, smartphones, and other digital devices. “Viewing a computer or digital screen often makes the eyes work harder,” says the American Optometrist Association.

This isn’t a disease but rather a collection of uncomfortable symptoms caused by the intense visual demands of screen use. These symptoms include:

Dry Eyes. We blink less frequently when focused on screens, leading to tear evaporation and dry, irritated eyes. “Normally, humans blink around 15 times per minute—but this “blink rate” can be cut in half when staring at screens,” according to the American Academy of Ophthalmology. (AAO)

Eye Fatigue. Constantly focusing and refocusing on close-up screens can strain the eye muscles, causing fatigue and discomfort.

Headaches. Eye strain can trigger headaches, particularly in children who may not recognize or communicate their discomfort.

Blurred Vision. Prolonged screen use can cause temporary blurred vision, as the eye muscles struggle to adjust.

Additionally, AAO notes that “although excessive screen time is not solely an "eye problem," its effects are readily apparent during a comprehensive eye examination through observation of pupil size and assessment of accommodative function.”

Does screen time cause astigmatism?

Astigmatism, a common refractive error causing blurred or distorted vision, is primarily caused by an irregular shape of the cornea or lens. While there’s no direct evidence linking screen time to the development of astigmatism, a study says that “screen exposure in early life could be associated with a higher risk of astigmatism.”

Children with undiagnosed astigmatism may experience increased eye strain and discomfort when using screens, potentially leading to headaches and fatigue. It's crucial to have regular eye exams to detect and address any underlying vision problems.

Does screen time cause blurry vision?

Blurry vision after screen time is often temporary, resulting from eye fatigue and dry eyes. However, persistent blurry vision warrants a visit to an eye doctor. It could indicate an underlying vision problem or the need for corrective lenses.

Furthermore, excessive near work, including screen time, has been linked to an increased risk of myopia in children according to the Mayo Clinic. While the exact mechanisms are still being researched, it's thought that prolonged close-up focus can pose risk to eye growth and development, as well as developing nearsightedness. Mayo Clinic defines nearsightedness or myopia as “a common vision condition in which close objects look clear but far objects look blurry.”

According to the AAO, “Nearsightedness happens when the eye grows too long from front to back. As a result, people with myopia have good near vision but poor distance vision.”

Also Read: 1 In 3 Kids Is Nearsighted—Study: How To Protect Your Child's Eyes

Does screen time cause eye bags?

While screen time itself doesn’t directly cause eye bags, the associated sleep disruption can contribute to their appearance. According to the Sleep Foundation, “The screens of electronic devices such as smartphones, computers, tablets, and televisions can emit blue light that disrupts our natural sleep cycles.”

Also Read: Is Your Child Grumpier And Harder To Wake Up In The Morning? He Might Be Sleep Deprived

Lack of sleep can lead to fluid retention under the eyes, resulting in puffiness and dark circles. Additionally, eye strain from prolonged screen use can cause rubbing of the eyes, further contributing to irritation and puffiness.

It is more accurate to say that habits created by excess screen time, such as late nights and sleep deprivation, are the leading cause of eye bags.

8 tips for parents to protect young eyes

While technology is here to stay, we can take steps to minimize its impact on our children’s eyes. Below are tips on caring for your precious little ones' vision.

1. Limit screen time.

Set clear limits on daily screen use, especially for younger children.

2. The 20-20-20 Rule.

If usage is inevitable, every 20 minutes, take a 20-second break to look at something 20 feet away to reduce eye strain.

Also read: Protect Your Child's Eyesight by Applying the '20-20-20' Rule

3. Encourage outdoor activities.

Promote outdoor activities to balance screen time and provide natural sunlight, which is beneficial for eye health.

4. Promote proper lighting.

Ensure adequate ambient lighting to reduce glare and eye strain.

5. Consider eye exams.

Schedule regular eye exams for your children to detect and address any vision problems early. To ensure early detection and treatment of childhood eye issues, the National Vision Screening Program, mandated by Republic Act 11358, provides vision screenings for kindergarteners aged 3 to 5. Additionally, Dr. Lorna Abad, former chair of the UP-PGH Department of Pediatrics, emphasizes that from birth, both doctors and parents should be aware of potential eye and vision issues in children.

6. Adjust screen settings.

Reduce screen brightness and use blue light filters to minimize eye strain.

7. Establish a bedtime routine.

Enforce a "no screens" rule at least an hour or two before bedtime to promote healthy sleep and prevent sleep deprivation.

8. Check on ourselves. 

Children often copy our behavior. If we maintain healthy screen time habits, our children will most likely benefit from that. 

Also Read: Kids Are Spending Too Much Time on Their Devices Because They Are Copying their Parents

By being mindful of our children’s screen habits and taking proactive steps to protect their vision, we can help them navigate the digital age without compromising their eye health. It's about finding a balance, allowing them to benefit from technology while safeguarding their precious sight.

Find out more how parents' screen time affects a child's development.