One of the most important things we can do for our eyes is protect them from the sun. When we buy sunglasses, most people do not realise that purchasing polarized glasses is important to protect our eyes fully from the sun. Polarized glasses are popular because they are able to reduce the glare from the sun much more than regular sunglasses can.
The way that polarization works is actually quite interesting and intelligent. Light that reflects off water and other reflective surfaces produce a light which is vibrating horizontally. To combat this, scientists worked out that they could block out these light waves with special filters.
Polarized sunglasses are made from a material which only allows vertical vibrating light to enter, effectively blocking polarized light. This means that people wearing this glasses can see clearly when they are facing reflective light.