Analysis On the Shape And Shading Type of Sunglasses
1）Surround
The shape of the encircling glasses can prevent light from shining around the frame and entering the eyes, which can protect your eyes from damage from all angles.
2）Gradual lens
1.Gradient lenses are permanently obscured from top to bottom or from top and bottom towards the middle. A single gradient lens (darker at the top and shallower at the bottom) cuts the glare from the sky, but lets you see clearly below. They are useful for driving because they do not dim your view of the dashboard. However, they are not so good at reducing glare in snowy environments or on beaches.
2.Double gradient lenses (darker at the top and bottom, lighter in the middle) may be more suitable for sports where light reflects off water or snow, such as sailing or skiing. It is not recommended to use dual gradient lenses for driving, as they will dim the dashboard.
3）Mirror coating
The mirror finish is a thin layer of various metal coatings on ordinary lenses. Although they can reduce the amount of visible light entering the eyes, do not assume that they will completely protect you from ultraviolet radiation.
4）Block 90% of infrared
Infrared wavelengths are invisible and generate heat. The sun has a low level of infrared, and the eyes can well withstand infrared. Some sunglasses manufacturers have made health claims on their products based on infrared protection, but research has not shown a close link between eye disease and infrared.
5）Blue blocking
Whether blue light is harmful to eyes is still controversial. The lens that blocks all blue light is usually amber, making your surroundings look yellow or orange. It is speculated that hue makes distant objects appear clearer, especially in snow or fog. Therefore, amber sunglasses are very popular among skiers, hunters, rowers and pilots.
Thank you for your reading
Mike optical Company
009@mikeeyewear.com
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