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Glare

Does the sun or dazzling lights affect you? Or do you see star bursts and haloes?

These are symptoms of glare. It is due to excessive light entering our eyes causing a tendency to either look away or around the source.

Glare around buildings
Photo used with permission
from tintandgraphics.com
Glare can affect us all in many ways and has many forms, coming from artificial or natural sources. This article focusses on the natural sources.

The main natural source of glare is sunlight, either direct or reflected. As sunlight can be intense, it can cause an involuntary action to close our eyes especially when driving in sunset.

Reflected sunlight affects us from sunrise as the light rays reflect from mirrors, windows, water or white surfaces (colour white has reflective properties) and this doubles the intensity of glare.

Sunlight is also a source of UV rays which also contributes to glare, especially at high altitudes in the winter, even more so with snow. Reflected UV rays increases the amount of glare by up to 30%.

Light scattering within the eye also causes glare, usually the scattering occurs in the lens within the eye.

Glare is a common complaint from those who have had cataract surgery as the new clear lens implants allow a lot of light into the eye and also from laser correction surgery.

Scene with non-polarised and polarised lenses
Polarised Sunglasses

Glare can be reduced by wearing sunglasses, even more so if the lenses are polarised.

Light rays are usually polarised horizontally when reflected which then causes an increase in brightness and glare.

Polarised lenses filter out horizontal and oblique light rays, only allowing the vertical polarised rays to pass through which reduces glare and reflections significantly making vision a lot clearer and comfortable.

Polarisation diagram
Photo used with permission from arborsci.com
Maximum polarisation occurs when the sun is at 36-38° from the horizon.

The most important advantage is ...

PROTECTION

See our polarised range.