First, look at the UV value, UV sunglasses near me now above 400 can effectively prevent ultraviolet rays.
Second, to see whether the sunglasses are polarized, the sunglasses that can be polarized can effectively filter the reflected light. When we choose it, we can tilt the lens 45 degrees to see whether the color of the picture inside is darker, if it is darker, it is sure to be the polarized lens.
Third, look at the transmittance of sunglasses, generally we will choose a lens with a transmittance of about 18% will be the best.
Fourth, to see whether things are deformed, at the time of selection, we can try it on, by moving the distance of the lens to see whether there will be distortion of the distant object, if there are these phenomena, it proves that it has optical tangents, is not qualified products.
Fifth, when purchasing products, we can also look at the color, such as brown, gray and dark green lenses will be better to protect the eyes, will not make the surrounding scenery distortion.
Precautions for sunglasses
- Cleaning:
Use detergent, hand sanitizer and other detergents to lather the lens, rinse it off and dry it with a lens wipe cloth, or directly use a special wet lens wipe paper, which is less likely to produce scratches than "dry wipe".
- Storage:
Store in time when not in use to avoid wear and tear or direct sunlight. Friends who drive, do not put sunglasses on the center console to let the sun exposure. Temporary placement of sunglasses, remember to face up to avoid wear. Use glasses cases or bags, as these special storage containers are soft inside and don't hurt the lenses.
- Storage:
Sunglasses need to be stored in a cool, dry place, away from humidity and heat.
- Adjustment:
If the sunglasses have any problems, such as loose elastic, loose lenses, etc., they should be adjusted or replaced in time.
Sunglasses are optical products, the frame force is not easy to deformation, not only affect the comfort of wearing, but also harm vision and health. Therefore, in the wearing process to avoid the glasses by external impact or pressure, do not wear must be put into the glasses box.
When purchasing sunglasses, we should consider the lens material, style and function comprehensively, and choose the style and function suitable for us according to our own needs and preferences. At the same time, pay attention to the comfort and maintenance when wearing, in order to extend its service life.
