Living With Blue Light Exposure

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The impact of blue light on the eye has gained increased interest in recent years due to the explosion of devices and lighting sources emitting wavelengths between 400nm and 500nm. General lighting, desktop computers, laptops, tablets, electronic reading devices, and smartphones all expose the eye to blue light. Nevertheless, we must remember that the amount of light emanating from artificial sources is a fraction of the radiation emitted from the sun. Having said that, we still have to be very aware of the possible implications of the harmful, and disrupting effects that blue light might have on our eyes from the increased use of digital devices on a daily basis especially during Covid.

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Ocular Conditions Associated With Blue Light Exposure

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• Age-related macular degeneration

• Basal cell and squamous cell carcinomas

• Photokeratitis

• Pterygium

• Cortical cataract

• Damage to the retinal pigment epithelium

• Eye strain during and after sustained near-work

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Digital Eye Strain

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We currently live in a society where electronic devices are deeply embedded into daily life. Ninety percent of families in the United States own at least one computer, smartphone, or tablet, while the typical American family has five or more of these devices.

Furthermore, between 40% and 60% of individuals experience visual or ocular symptoms while viewing electronic displays for prolonged periods of time. These symptoms—including eye fatigue, ocular irritation, burning, eye strain, redness, dryness, blurred and double vision—are collectively termed digital eye strain (DES).

 

Although the symptoms are typically transient and disappear soon after device use ceases, some individuals experience ocular discomfort for a sustained period after prolonged viewing of an electronic screen.

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Many have speculated that the high levels of blue light emitted from digital displays may be responsible for the development of DES symptoms.

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Blue light exposure can also affect the physiological circadian rhythm and can affect our sleep patterns, and as such exposure should be minimized to two to three hours before bedtime.

 

By far the most significant source of low-wavelength radiation comes from sunlight, and excessive sun exposure is a well-known risk factor for age-related macular degeneration, carcinoma, photokeratitis, pterygia, cataract, and retinal pigment epithelium damage. 

 

We recommend that any concerns that you have regarding exposure to blue light via digital devices, be addressed by having a full comprehensive eye examination, to find the best solution to your visual needs.

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