There is a lot that people can do outdoors if they can spare the hand that shields their eyes from the harsh sunlight. Sunglasses were made to prove this fact. Indeed sunglasses let people move in the sunlight without crinkling up their faces or placing one of their palms above the eyebrows, involuntarily, like an awning.
Daytime is better utilized with sunglasses, be it for shopping or sightseeing. Being at the beach from mid-day may not seem as dreadful anymore thanks to tinted sunglasses. The sun’s ultraviolet rays can finally be no threat, at least to the eyes. But as is human nature, we all want more from everything, and so did we in the case of sunglasses. The tinted glasses were replaced by photochromic lenses, which changed shades depending upon the light, so that the discomfort of adjusting suddenly to changing lights became easier for the eyes. But even this was not enough. The sunglasses manufacturers then came up with sun readers.
The simplest sun readers were essentially for those who loved reading. All that sunglasses manufacturers had to do was to replace the non-prescription glass in the tinted sunglasses with prescription glasses, and we had sun reading glasses. But that also meant using two different types of sunglasses which is cumbersome. Soon sun readers evolved into glasses that were bifocals. The upper part of the glasses did their job of protecting the eyes from the sun’s ultraviolet rays, while the lower part of the glasses let the user read books or do other close up activities outdoors, with personal lens prescriptions.
The sun’s warmth in spring and summer is certainly the most pleasant thing to enjoy either in the countryside or by the pool, after the harsh cold winter. The seamless transition of these bifocals was the next step. The transition was facilitated by high grade plastics, which were already popular in non-prescription sunglasses.
The developments did not stop here! This time, it was Amazon’s Kindle that forced sun readers to change. With Kindle traditional books became slimmer, and lighter. Therefore, the device became extremely popular among avid outdoor readers, and soon highlighted the drawback of existing sun readers. The glare from the screen made reading books on Kindle by the pool or beaches a difficult proposition. This was because Kindle’s white screen reflected the sun’s rays and these could cause serious eye damage. Polarized glasses solved the problem as these prevent distortions of color, and glare.
Effectively, sun readers now can be bifocal or completely made from prescription glasses. For aesthetic reasons, care has been taken to ensure that the bifocal nature of these sun readers is not obvious. There are several tints to choose from in fact. Plastics have become a popular material to make these glasses because they are less likely to cause injuries, and offer more variety.
Sun readers obviously reduce strain on the eyes because they have prescription lenses incorporated in them. Because of the Polarized technology that is incorporated in these glasses, the eyes are less likely to feel tired, and so in general vision would be prolonged considerably. Thanks to the bifocal sunglasses people do not have to carry multiple sets of sunglasses around either. They also do not have to remove them immediately upon entering into some room or leaving the room because the photochrome technology adjusts to such variations very easily. So it is surely much more convenient and practical. This new technology also ensures that the material of the lens, whether made from glass or plastic, does not develop scratches easily, and it can easily be wiped clean should the need arise.