In the previous article, we discussed “Why do Turkish women wear sunglasses?”. In this article, let’s talk about “What is the difference between prescription sunglasses and regular sunglasses?”.
Prescription Sunglasses
From the perspective of the style, there is no obvious difference between prescription sunglasses and non-prescription sunglasses. There are bifocal lenses, focus progressive lens, reading glasses, etc. Prescription sunglasses can be made from a variety of materials, such as high refractive index materials, polycarbonate, plastic (CR-39), or glass. The first two materials are better and are used the most.
Advantages of Regular Sunglasses
The biggest advantage of ordinary sunglasses is the good prevail trend. Ordinary sunglasses can be added a variety of coloring compounds to the lens, to produce different colors of the lens, with a variety of styles. If you regard sunglasses as a fashion accessory, then ordinary sunglasses can meet your needs. And the human eyes adjust the light by regulating the pupil size in the sun. When the adjusting range is more than human eyes, the light intensity will cause eyes damage, so we need to wear ordinary sunglasses when we do outdoor activities especially in the summer of to provide shade.
Disadvantages of Regular sunglasses
Ordinary sunglasses only use the effect of reducing light, because ordinary lenses can not filter light, so they can only reduce the intensity of glare, ultraviolet light, etc., and can not completely block this harmful light. Its function is to reduce the damage to the eyes. Ordinary sunglasses can weaken the strong light, but can not filter glare. Diffuse reflection will still be exposed to the human eye, resulting in unclear place ahead, serious color difference, eye fatigue, and other conditions.
Choose Prescription Sunglasses
Patients with refractive errors can choose prescription sunglasses. Following the refractive condition of the wearer, prescription sunglasses are sunglasses specially formulated after optometry. People with good eyesight don't need prescription sunglasses. Only those with refractive errors or presbyopia should select this kind of sunglasses. These sunglasses need to be worn all day, both indoors and outdoors. The lenses are not flat, but they can correct nearsightedness, farsightedness, astigmatism, or presbyopia.
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