All of us know that regular sunglasses on the face can help in fighting against hazard rays or light in the sunlight. There are kid’s sunglasses and sunglasses for adults, both of which can get great benefit from the protection. Players in the current sunwear market can be classified according to different rules. Black sunglasses and sunshades in other colors are two major categories indicating a coloring difference. In terms of frame shape, there are full-frame, semi-rimless and rimless sunglasses. A special type called performance sunglasses is different from regular ones because they are used mainly in sports and are made with particular lenses and frames. Traditionally worn for eye protection, some modern sunglasses can also offer vision correction equal to that of regular prescription eyeglasses. This is not the end. The great progression in sunwear industry has made many more options or combinations a reality. Polarized bifocal sunglasses are a typical example.
Interpreting this easy phrase, a first additional function or benefit added to regular sunglasses is vision correction. The advantage claimed by bifocal reading glasses over traditional reading glasses may have been long recognized by the elderly group. Presbyopia is a major dangerous source to the eyesight of people who are in their 40s or older. Regular reading glasses can only help this group of people deal with presbyopia. If there is a presence of another vision problem like myopia or hyperopia, bifocal reading glasses are the more convenient solution. Nowadays, this kill-two-birds-with-one-stone function has been incorporated into sunglass lenses. Polarized bifocal sunglasses just take use of these lenses.
The other additional benefit provided by polarized bifocal sunglasses is associated with sunlight glare. In summer, the sunshine is always fierce and reflected glare from flat surfaces such as smooth water can be strong. This type of horizontally reflected light can be filtered by polarized sunglass lenses. As a result, these lenses can improve comfort and visibility during outdoor activities. Fishermen, boaters and drivers are some of the target users of these products.