In the bright sunlight
of this summer, all people have already worn sunglasses in different colors.
But we need to remind you that the protection of eyes is the essential thing of
you, since the improper selection and wearing of sunglasses may harm your eyes,
and not everyone is suitable to wear sunglasses.
First, Poor-quality
sunglasses can induce acute attack of glaucoma. After wearing sunglasses for a
long time, the visible light that enters your eyes will reduce gradually, so
the pupil will naturally open by itself, resulting in a narrow anterior chamber
angle, which as a consequence will easily induce acute angle-closure glaucoma
attack suddenly. Normally, the patients will have eye pain, headache, and rapid
decline in visual acuity, and even accompanied by nausea, vomiting and other
symptoms. Therefore, patients with glaucoma or suspected people are recommended
not to wear sunglasses.
Second, poor
sunglasses can lead to amblyopic. Children under the age of 6 have not yet
fully mature in visual functions. After a long-term wearing of sunglasses,
macular fundus can’t be effectively stimulated, which will affect the further
development of their vision, and even worse, it will induce the formation of
amblyopia. Therefore, such children are not suitable to wear sunglasses.
Fourth, poor
sunglasses are likely to lead to syndrome, which is particularly prevalent
among the young people. They prefer to wear wide, thick, and heavy-weight broad
frames of sunglasses. People wearing such glasses for 1 to 2 weeks will emerge
numbness between the eyes or the two parts of cheek, perception of symptoms
such as retardation, nasal breathing, as suffering from a cold.
But how can people
buy the good quality sunglasses?
First, you should
select at regular glasses shops for formal anti-UV sunglasses created by formal
manufacturers. Glasses sold by street stalls, hawkers often can’t meet the
criteria for protection against ultraviolet.
Second, pay special
attention to the lens surface which must be smooth, ripple-free, flawless, no
bubbles and so forth. While in the choice, you’d better place lens flat, so as
to observe from the horizontal direction to see whether warping or not.
Third, in the choice of lens
colors, depending on different venues, the general depth is better to be
medium, such as light gray, light brown, light green and so on; all these
sunglasses have better ultraviolet absorption functions. Of course, if you
require a strong shading effect, it should be a better choice of darker lenses.
However, those who ride or drive cannot choose too deep colors, or they cannot
effectively identify the different colors of traffic lights.
In
conclusion, the poor sunglasses have great negative effects on your eyes. So
obtaining a pair of good quality sunglasses is the most important thing of you,
especially in hot summers.