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There are two kind of tear. One is the tear generated physical stimulation, for example the tears comes out when crushing onion. The other one is emotional tears. When people are happy, upset, or mad, they will well up with tears. There are several theories about why people crying with tears. The one I believe in is that tear is the medium to transport some extra substance out of body. It is said that foreign stimulation is transmitted between nerves by central neurotransmitter. The amount of neurotransmitter shall be comparatively stable. When there are more central neurotransmitters than needed, special lytic enzyme will resolve the extra neurotransmitters. When people get mad, upset or excited, the extreme emotion will promote the generation of too much neurotransmitters which could be totally resolved by lytic enzyme. Too much neurotransmitter is harmful to peopleâ€™s health. It will improve the morbidity of ulcer and enteritis. So, the tear gland secretes tears to rinse the extra neurotransmitters out on purpose of protection.
It is really bad for you to suffer from astigmatism which will make you cause blindness if you don't protect your eyes carefully. If the eyeball in refractive status is on the different meridian dioptre, especially on the surface of the cornea curvature radius which is not a sphere, the eyes in the absence of regulation will have 5 meters equal ray. The eye of different warp after inflectional cannot form a focus on the retina and form focal line. Thus the retina image blurred this refractive error state which is called astigmatism. If you use the eyes too much time in front of the computers which causes the damage on the eyes, you who are with astigmatism may have high possibility to get blindness. The astigmatism will cause you to have the blurred vision. Your far near vision is poor, seem to have double vision. You may have the easy eye fatigue, eye pain, headache, nausea and vomiting. You may have low astigmatism, with your far near vision generally normal. But when fine visual work gets easily in eye fatigue, your high astigmatism often appear blurred vision or the vision lost. You'd better wear the eyeglasses to help you get the right vision. You should protect the eyes from the healthy diet and good rest.
I will recommend you several ways to judge it. First, you can view the manufacture place of origin, pay attention to the production time. Second, you should compare the prices of sunglasses in multiple stores, if the price differences are bigger, you should consider there may have fake sunglasses among these sunglasses. Third, gradient is the color of the lens is changed from one color to another color, and it can block the glare of the sun. So you can judge the sunglasses thorough this aspect. Fourth, sunglasses have another function, it can reflect light, and people can not see your eyes when you wear the sunglasses, but it can make you clearly see the scene outside. Hope these methods can help you.
First, rinse both sides of your eyeglasses lenses under warm water. Second, make the a microfiber rag wet with warm water and drop a small amount of mild dish soap on the rag. Then, use the rag to wipe both sides of the lenses in a circular motion gently. Finally, dry the lenses with the another dry and clean rag. In this way, your eyeglasses are less likely to get foggy and cloudy.
Your basic premise that one can see better with the glasses tilted is false. If the lenses have the right correction for your eyes, then tilting them will make things worse.The reason this does work often is that the lenses are not at the right correction. In young nearsighted (myopic) people, the myopia usually gets worse with age. The glasses may have had the right correction 2 years ago, but meanwhile the eyes have gotten a little more myopic and a stronger correction is required. Tilting the lenses makes light pass thru them in a way that effectively makes the lens seem stronger at that angle. If distant objects are a little blurry due to more myopia than the lenses are correcting, then tilting the lenses will make horizontal edges sharper. It does nothing for vertical edges. But, overall the image will appear sharper.
Change frame is not difficult. But your lenses can not be changed. You can just go to an optical store and buy a frame that is suitable for your lenses and let them help you assemble.
All right, looks like your eyes are pretty dry and uncomfortable due to some particular reasons. So, generally speaking, dry eyes is not serious but you'll have to take it seriously, for dry eyes could also cause some other problems such as watery eyes, painful eyes. Actually, buckthorn oil could indeed relieve your dry eyes , but you should not drop it into your eyes directly. Here I would like to recommend something like vitamin B and E to you, or some vegetables. Eye drops are also helpful.
Frankly speaking, it has nothing to do with brand. It depends on what type of lenses you choose. If you want to be looked naturally, you can try the contact lenses with enhancement tint. It is a solid but translucent tint that is a little darker than a visibility tint. As the name implies, an enhancement tint is meant to enhance the natural color of your eyes. Colored contacts with this type of tint usually are best for people who have light-colored eyes and want to make their eye color more intense.
Color Enhancing Contact Lenses are type of cosmetic contact lenses that can enhance the natural eye color rather than completely change their pupils color. This lenses are worn to intensify a personâ€™s natural eye shade to make it more dramatic. Wearing the color enhancing contact lenses can make your eye appear brighter, bluer, greener, and so forth.
Eye herpes is a more serious nature of the eyelid skin diseases, by a branch of the trigeminal ganglion and half months ganglion, or some caused by varicella virus infection. Most of the lesions are light, very few form pus herpes, and individual harm for corneas, cause vision loss. In general, people under the age of 50 after herpes zoster occurs 1-2 weeks to heal on its own, but for elderly patients should be sure to pay more attention. You can use antiviral drugs, take oral acyclovir in the beginning, if it goes to worse, do not forget to get treatment in time to a regular hospital.
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