In our modern digital age, we are constantly exposed to various light sources, particularly the blue light emitted by our computer screens, smartphones, tablets and even LED bulbs. This increased exposure to blue light has led to growing concerns about its effects on our visual health, particularly in terms of eye strain.To better understand these implications and find ways to protect our eyes, let's explore symptoms and potential solutions, while also emphasizing the importance of consulting with an eye care professional for a thorough examination and personalized advice

What is blue light, and how does it affect our eyes?

Blue light is part of the visible spectrum, with a short wavelength and relatively high energy. It is naturally present in sunlight but is also emitted by many artificial sources, particularly electronic devices with screens. Unlike other colors in the light spectrum, blue light can penetrate deeper into the eye. It can reach the retina.

When our eyes are exposed to high levels of blue light, it can disrupt our circadian rhythm by suppressing the production of melatonin, the sleep hormone. This can lead to sleep problems and disrupt our natural sleep cycle. What's more, blue light can also cause increased eye fatigue.

The links between blue light and eye fatigue:

  • Retinal stimulation: Blue light can stimulate the retina more intensely than other colors in the light spectrum. Prolonged exposure to this light can fatigue retinal cells, resulting in a sensation of eyestrain.
  • Flicker reduction: When we use screens, we tend to blink less often, resulting in reduced lubrication of our eyes. This can lead to a feeling of dryness and discomfort, contributing to eye fatigue.
  • Contrast and glare: Screens emitting blue light can also cause excessive glare and contrast, constantly forcing our eyes to adapt. This frequent adaptation can lead to increased eye fatigue.
  • Impact on sleep quality: As mentioned above, blue light can disrupt melatonin production, affecting our sleep quality. Insufficient or poor-quality sleep can contribute to general fatigue, including eye strain.

How to reduce the effects of blue light on eye fatigue:

Blue-light filter glasses: 

Ask your optometrist for a blue light filter in your glasses. This treatment filters out just the right amount of blue light, so your eyes can easily do their job. They help regulate your circadian rhythm and improve your concentration and mood while maintaining clear vision.

Blue light filters:

Using blue light filters on your electronic devices can help reduce exposure to this harmful light. Many apps and device settings offer options to filter blue light, which can help mitigate the effects of eyestrain.

Pause and rest your eyes:

Practicing the 20-20-20 rule can be beneficial. Every 20 minutes, look at something at least 20 feet away for at least 20 seconds. This rests your eyes and reduces eyestrain.

Adequate lighting:

Make sure your workspace is well-lit to reduce eyestrain. Use indirect light sources wherever possible and avoid direct glare from screens.

Limit exposure:

Reduce your screen time, especially before bedtime. Try to avoid using electronic devices for at least an hour before bedtime to allow your body to prepare for sleep.

The blue light emitted by our electronic devices can significantly affect eye fatigue. By understanding these effects and taking steps to reduce our exposure, we can help preserve the health of our eyes and alleviate the symptoms associated with eye fatigue.