To conduct the study, researchers equipped men and women aged 18 to 87 with a compact, mobile measuring device and also conducted a laboratory experiment under controlled lighting conditions. Participants were indoors with artificial and natural light, worked on a computer with an LED screen, and walked outside in natural light. After this, all subjects were exposed to artificial light of various wavelengths (red, green, blue and white) and then their pupil dilation was measured.
It turns out that pupil width in humans decreases by about 0.4 mm every decade. This supports the hypothesis that the student’s ability to adapt to changing lighting conditions decreases with age. Young people see dim night environments better than older people.
When light enters the eye, the pupil acts as a camera aperture and the retina acts as a light sensor. In bright light, the pupil diameter narrows to 2 mm, in dim light it expands to 8 mm.
Decreased visual acuity at home or at work can negatively impact your overall quality of life and work due to decreased pupil dilation. As a result, at night a person runs the risk of tripping over something in the house. In this case, you need a glare-free, well-lit place to work.
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Source: Ferra
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