|
Photochromic lenses, also called transition lenses, which can change its color according to surrounding light conditions. Some online optical stores claim that this kind of lenses this kind of sunglasses lenses could change from clear inside to dark outdoor, which refers to a specific chemical reaction the lenses have to ultraviolet (UV) radiation. This feature actually attracts a large group of customers.
Comparing with the common lenses, photochromic lenses can provide UV 400 protection. But these lenses also have some shortcomings and can not replace sunglasses in some aspects. For example, Transition lenses do not fight against the harmful sunlight rays. And it can’t help drivers see clearly the road ahead without narrow their eyes because of the glare from the sun.
In addition, transitions lenses can be an ideal choice for those not wanting to exchange two pairs of glasses from clear eyeglasses to dark sunglass. Now also it is available in most lens materials and lens styles. Transitions lenses are an excellent choice for wearers in eyeglasses. Protection for UV damages to the eyes should start at an early age. What better way to acquire that and comfort from the bright sun than to include photochromic in your prescription eyeglass lenses.
However, there is a disadvantage which is photochromic lenses can’t offer too much color selection, normally grey or brown limits your choice. And, sometimes lens needs transition time which can be a bit annoying, and they are not as dark as your general sunglasses. Even if it’s more expensive, and full transition time is between 5-10 minutes depending on a lens. Most wearers still like to buy these special eyeglasses.
All in all, transition lenses are a good choice for people who need to regularly move from indoors to outdoors or vise versa. But for those spending an extended amount of time outdoors, sunglasses are irreplaceable. When purchasing photochromic eyeglasses needs lots of the money you are spending. If you want to buy discount sunglasses and don’t object to change at a much slower pace, we suggest you to choose the online shop. Such as: www.ozoptical.com. |
