Today, most of the sunglasses are manufactured for protecting our eyes from the sunrays. The sunglasses often have labels that ensure protection from different types of natural radiation and ultraviolet radiations. You should be aware of what type of light you need to protect your eyes from and what kind of light is not harmful. Some of the suggested types of sunglasses are listed below.
Make sure to buy sunglasses that have the UV protection feature that blocks 99 to 100 percent of UV light. The long-term exposure to UV rays from sunlight causes eye damage and cataracts and sometimes cancer as well. The UVB radiation is more harmful to the skin and eyes compared to the UVA radiation. The glass and plastic lenses absorbs a minimal amount of ultra-violet light, but the UV absorption rates can be improved with the adding of chemicals to the lens materials when manufactured or applying special coatings on the lenses.
The polarized lenses avoid reflected glare i.e. the sunlight that reflects off the smooth surfaces such as car windows, water, pavement or chromed surfaces. These lenses are highly useful when fishing or driving. The polarized lenses have nothing to do with the UV light absorption. But, today, various polarized lenses consist of UV-blocking substances as well.
This type of lenses offers a great feature i.e. the lens gets dark when exposed to bright light automatically and becomes lighter in the case of low light. The darkening of the lens takes place in 30 seconds whereas the lightening of the lens takes at least 5 minutes. The photochromic lenses are available in gradient or uniform tint form. Even though photochromic lenses are great UV-absorbent glasses, it will take time for them to adjust to various lighting conditions.
These types of glasses are shaped in such a way that they can keep the light from shining into your eyes or around the frames. Various studies have stated that considerable amount of UV rays enter around the typical eyeglass frames and reduce the advantages of using protective lenses. The wraparound sunglasses that have large frames can help in protecting your eyes from different angles.
These types of lenses are shaded permanently from top to the bottom or from the top and bottom to the middle. The single gradient lenses can avoid glares from the sky and help you see clearly. These glasses are essential when driving as they never dim the view of the dashboard. They are pretty good for reducing the glare at the beach or in snowy surroundings. The double gradient lenses might be better for sports in the areas of snow or water.
It’s still a controversy whether blue light is hazardous to the eyes or not. The lenses that block all the blue light are amber colored and they give you a yellowing or orange look through the glass. This feature makes the distant objects look more distinct, especially during haze or snow. This is the main reason why amber sunglasses are highly recommended for hunters, skiers, pilots and boaters.
I hope the above features have given you more information about the recommended types of sunglasses.