The aim of the bachelor thesis is to recognize and analyze the influence of visible and invisible flickering from light sources on a person. Light flickering can cause serious health problems, in the worst case in the form of epileptic seizure.
With more thorough research of the influence of the light flickering on the human body, especially so-called invisible flicker, opens questions about the link between invisible flashing and unwanted biological influences and health issues.
The first part of the thesis covers the presentation of the biological influence of light on the human body. I present the human perception of light and the positive and negative effects that occur when a person interacts with light.
In the second part, the light flickering is broken down into the most important sub-categories: visible flicker, invisible flicker, stroboscopic effect and phantom effect. To make it easier to comprehend where flicker is occurring, some of the most commonly used light sources that cause flicker are listed and described.
In the final part of the thesis summaries of two studies on the effect of visible and invisible flicker on humans are presented. Research shows that both the invisible flicker and the visible flicker have a negative impact on humans, as they can cause short-term problems such as headaches, mistakes while performing tasks and losing concentration, or more serious health problems, such as migraines or even epileptic seizures.
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