You cannot tell how much UV protection a pair of cheap fake ray ban sunglasses will provide by their price, colour, or by the darkness of the lenses. Look for a label that lists the type and amount of protection. Manufacturers follow voluntary industry standards when labelling these products. Sunglasses that comply with industry standards are grouped in three categories:
- Cosmetic fake ray ban sunglasses have lightly tinted lenses for use in sunlight that is not harsh. They block from 0 to 60 percent of visible light and UVA rays, and between 87.5 and 95 percent of UVB rays. These glasses are not usually recommended for daylight driving.
- General purpose replica ray ban sunglasses block from 60 to 92 percent of visible light and UVA rays, and between 95 and 99 percent of UVB rays. These sunglasses are good for driving, and are recommended whenever sunlight is harsh enough to make you squint.
- Special purpose sunglasses block up to 97 percent of visible light and up to 98.5 percent of UVA rays. They also block at least 99 percent of UVB rays, and are suitable for prolonged sun exposure. These sunglasses are not recommended for driving.