The Impact of Blue Light on Eye Health: What You Need to Know

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Posted by: Missouri Eye Institute in Blog on March 17, 2025

March is Workplace Eye Wellness Month, a perfect time to focus on protecting your precious vision, especially in our increasingly digital world. One growing concern is the impact of blue light on our eye health. At Missouri Eye Institute, we aim to shed some light on this topic and offer practical advice.

What is blue light?

Blue light is a high-energy, short-wavelength light found in both natural sunlight and artificial light sources like digital screens (computers, smartphones, tablets) LED lighting and even some fluorescent lights. While sunlight is the most significant source of blue light, the close proximity and extended use of digital devices are of concern for eye health.

How does blue light affect our eyes?

While some blue light is necessary for good health (it helps regulate our sleep-wake cycle) overexposure can have potential negative effects:

• Eye strain and discomfort: Prolonged screen time can lead to digital eye strain, characterized by dry eyes, blurred vision, headaches and neck/shoulder pain. Blue light contributes to this discomfort.
• Sleep disruption: Blue light exposure, especially in the evening, can interfere with the production of melatonin, a hormone that regulates sleep. This can make it harder to fall asleep and can lead to poor sleep quality.
• Potential long-term effects: While research is ongoing, some studies suggest that long-term exposure to blue light may increase the risk of age-related macular degeneration (AMD) later in life. The macula is the central part of the retina responsible for sharp, detailed vision.

Protecting your eyes from blue light

In a modern, tech-driven environment, it’s close to impossible to avoid blue light. Here are some practical steps you can take to minimize the impact of digital eye strain:

1. Limit screen time: Take regular breaks using the 20-20-20 rule: Every 20 minutes, look at something 20 feet away for at least 20 seconds.
2. Adjust screen settings: Reduce the brightness of your screens and use warm light filters (night mode) in the evenings.
3. Blue light blocking glasses: These glasses can filter out some of the blue light. Discuss their use with your eye doctor to see if they are right for you.
4. Proper lighting: Avoid glare on your screens and use soft ambient lighting in your workspace.
5. Regular eye exams: Comprehensive eye exams are crucial for detecting any eye problems early.

Vision correction and eye comfort

If you already experience vision problems like nearsightedness, farsightedness or astigmatism, spending long hours in front of a computer can exacerbate these issues as well. Correcting your vision through LASIK, PRK or other vision correction procedures can significantly improve your visual comfort and reduce eye strain associated with digital device use. Clearer vision means less squinting and a more comfortable and productive workday. It can also make using blue light filters or glasses more effective, as your vision will be optimally corrected.

Prioritizing your eye health

Protecting your eyes from blue light is an essential part of maintaining overall eye health. By implementing these strategies and scheduling regular eye exams, you can ensure your vision stays sharp and comfortable for years to come. Contact Missouri Eye Institute today to schedule your consultation and discuss your vision correction options.

Frequently asked questions about blue light and vision

Does blue light cause cataracts? 

While research on blue light’s long-term effects is ongoing, current studies do not directly link blue light exposure to cataracts. However, some studies suggest there may be an increased risk of AMD with prolonged blue light exposure.

Are blue light filters on devices enough to protect my eyes? 

Blue light filters can help, but they are not a complete solution. Combining them with other strategies, like limiting screen time and taking breaks, is essential.

Can children’s eyes handle blue light better than adults? 

Children’s eyes may actually be more susceptible to blue light due to their larger pupils and clearer lenses. Limiting screen time for children is particularly important to long-term eye health.

Are all blue light blocking glasses the same? 

No, the amount of blue light blocked varies between different brands and types of glasses. Consult your eye doctor for recommendations that suit your specific vision needs and lifestyle.

Is there any benefit to blue light? 

Yes, exposure to blue light during the day is beneficial for regulating your sleep-wake cycle, boosting alertness and elevating mood. The problem arises with excessive exposure, especially in the evening.

Does blue light affect my mood? 

Yes, blue light can impact mood and alertness due to its effect on melatonin production and circadian rhythms. This is why it’s important to limit your exposure to blue light, particularly in the hours before bedtime.

Missouri Eye Institute has helped thousands of patients attain freedom from glasses and contact lenses, with convenient locations in Springfield, Joplin and Branson. Contact us at (800) 383-3831 to schedule a thorough consultation or visit MissouriEye.com to learn more about our services.