Glare

What is glare?

Glare refers to a visual disorder caused by excessive Brightness or when there are large differences in brightness within the field of vision. It impairs vision by reducing visual comfort and visual performance.

The Effect of Glare on Vision

Glare can affect visual perception in various ways. It makes it harder to make out details and puts more strain on the eyes.

A distinction is made between two forms:

• physiological glare: directly affects visual performance
• psychological illusion: reduces visual comfort

Both conditions are caused by unfavorable lighting conditions or excessive luminance from light sources.

Direct and Indirect Glare

Glare is classified as direct and indirect glare.

Direct Glare

Direct glare occurs when a light source is too bright or is located directly in the field of view. This can happen, for example, with a light source that is clearly visible Lamp or in bright sunlight.

Indirect Glare

Indirect glare is caused by Reflection light on shiny or reflective surfaces. In this case, the light is not perceived directly from the light source, but rather through reflections in the room.

Causes of Glare

Glare often occurs when:

• the luminance of a light source is too high
• There are significant differences in brightness within the room
• Light sources are positioned poorly
• highly reflective materials are used

These factors influence the perception of brightness and can lead to visual disturbances.

Technical Measures to Reduce Glare

Various technical solutions are used to reduce glare. These include:

• Shielding the light source to reduce direct visibility
• Use of translucent materials such as frosted glass or fabric covers
• adjusted position and height of the light fixture
• Precise directional control of light, especially with spotlights
• Use of appropriate light sources with optimized light distribution

These measures help distribute the brightness more evenly and limit the direct perception of the light source.

Significance for Lighting

Glare is an important factor to consider when planning Lighting, as it affects the quality of the light and visual perception within the room. Controlled light distribution reduces distracting effects and ensures stable visibility.