Protecting Vision in the Digital Age

Blue Light Defined

A high energy visible light in the spectrum of 415 – 495 nanometres, blue light primarily comes from the sun but it is also emitted by digital devices such as smartphones, tablets, computers and LED lighting.

Potential Effects on Children’s Eye Health

Prolonged exposure to blue light can lead to digital eye strain, also known as computer vision syndrome. Symptoms include:

• Eye fatigue and discomfort
• Dry eyes
• Headaches
• Blurred vision

Impact on Sleep and Behaviour

One of the most significant concerns regarding blue light exposure is its effect on sleep. Blue light suppresses the production of melatonin, the hormone responsible for regulating every human’s sleep-wake cycle.

Protecting Children’s Eyes

To mitigate, negate or even eliminate the potential risks of blue light exposure, these are several strategies parents and caregivers can consider using to protect the eye health of children.

• Limit screen time: Follow age-appropriate guidelines for screen use.
• Encourage outdoor activities: Time spent outdoors has been associated with a reduced risk of myopia development in children.
• Use blue light filters: Consider installing blue light filtering apps on devices or using screen protectors designed to reduce blue light emission.
• Adjust device settings: Many devices now have built-in “night mode” or “eye comfort” settings that reduce blue light emission.
• Practise the 20-20-20 rule: Every 20 minutes, take a 20-second break to look at something 20 feet away. Over a period of time, this will help reduce eye strain.
• Consider blue light filtering glasses: While their effectiveness is still being studied, some eye care professionals recommend these for children who spend significant time in front of screens.
• Regular eye check-ups: Ensure children have regular comprehensive eye exams to monitor their vision health and detect any issues early.

Conclusion

As it is World Sight Day, it is crucial to remember digital devices, when used appropriately, can be valuable tools for learning and development. The goal should not be the complete elimination of time spent on screens but to find the least dangerous middle ground where children can still benefit from technology.

Frequently Asked Questions

Q: How can I reduce my child’s exposure to blue light?
A: Limit screen time, encourage outdoor activities, and use blue light filtering apps or screen protectors.

Q: Are blue light filtering glasses effective?
A: While their effectiveness is still being studied, some eye care professionals recommend them for children who spend significant time in front of screens.

Q: How often should I have my child’s eyes checked?
A: Ensure regular comprehensive eye exams to monitor their vision health and detect any issues early.