According to the Vision Council 87.7% of people 18-39 years old use digital devices for more than two hours per day, 82.6% ages 40-59, 76.3% ages 60 and up and 72% of Americans report their children/teens younger than 18 use digital devices more than two hours per day. Digital devices are not going away. Luckily the ophthalmic industries are responding by developing new products to help to reduce the various aspects of digital eye strain.
Blue light is at the highest energy, shorter wavelength end of the visual spectrum. It flickers more and decreases contrast, thus reducing clarity. Blue light comes largely from sunlight, but is also emitted through fluorescent lights, LED lights, LED TV's, computer monitors, tablets and smart phones. While the exposure from monitors, tablets and phones is small compared to the sun, blue light emitting devices are in close proximity to the eyes and blue light contributes to digital eye strain. Research shows that changes in the light environment lead to changes in circadian rhythms that, in turn, influence sleep and contribute to alterations in mood and cognitive function. Other studies have also reported that exposure to digital devices at bedtime could negatively affect sleep and circadian rhythm.
As a result, we recommend lenses that filter out blue light for our patients who frequently use screens and together with a premium anti-glare option and a proper refraction our patients notice instant improvement in symptoms as these lenses help to improve contrast and clarity and decrease glare.
Excerpted from Optometric Management, August 2018