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As a normal wearer of glasses, it is always quite natural for us to meet some problems that typically for glass wearers. Of all the matters that we are facing, maybe the most common and important one is glasses’ falling down from a relatively high place. In the past when most of the lenses of the glasses were made of real glass, case like this might be really a serious one since we all know that glass is easy to be broken. When case like that happened and unfortunately the lenses were broken, what people could do was to rematch the frames with another or another two lenses. Or even worse, the whole glasses were destroyed so that one had to buy another new pair of glasses. All these were things mattered people in the past. What about nowadays? We still have not a few problems.
Today, as the material of glasses develops, we do not need to worry about the broken of the lenses themselves and instead, what we do care is the strength of the frames which sometimes are easily to be twisted or broken when being hit. So what should we do when thins like falling off a high place or someone has twisted your frames by accident? Here are two solutions for you.
The first one is in the case that just a little damage has happened to your frames. For example, if the legs of your glasses are twisted not so badly, you yourself can at once do something to help your frames. We can try to replace the legs into their normal position and when time permitting; we can go to the optical shop for professional help which is often free of charge.
The other matter is when our frames are badly damaged or even get hurt with the lenses. As to this case, we should carefully gather as many parts of the glasses as possible and bring all of them to the optical shop. Well, if the accident does hurt you yourself, you should of course first of all go to the doctors’.
Well, above all, the two problems and the solutions mentioned above are not enough, obviously. But when accidents happen, we should bear in mind that life and health come first and then it comes to the glasses.
Article Source:http://www.articlesbase.com/vision-articles/what-can-i-do-with-my-broken-glasses-1560225.html
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Contact lenses were invented by a German oculist, A.E. Fick, as early as in 1887 and were given the name of contact then. However, it hasn’t become popular until 1930s. The first generation contact lenses were made of glass which was easily broken and dangerous for people’s eyes. Contact lenses become more and more popular since keratoscope were invented. Nowadays, more and more people choose to wear contact lenses rather than the tradition glasses. Are contact lenses comfortable and good for people’s eyes? Is everyone capable to wear contact lenses?
The advantages of contact lenses count for the popularity of them. People tend to wear contact lenses when they are having sports or having fun. Contact lenses bring freedom for eyes. One can does his business without any restriction. In addition, the things are seen more like the real ones through the contact lenses. What’s more, many girls choose contact lenses in order to make their eyes look bigger and sharper.
Despite of those truths, contact lenses are not suitable for everyone. The people with diseases in cornea can not wear contact lenses. Teenagers are advised not to wear contact lenses because of their incomplete developed eyes. The olds are not fit for contact lenses concerning the health of eyes. In addiction, soft contact lenses are somewhat foreign objects to eyes. They may be uncomfortable for some people. In order to keep healthy, people need to clear lenses regularly. People who can not stick on the clear keep habit are not the ideal users of soft lenses. Overuse of lenses can also lead to eyes’ tiredness. People in the environment of dusts and polluted air can not wear contact lenses either.
One should think carefully before he chooses contact lenses, and receive a careful check from Ophthalmology clinic. And even for ones who are fit to soft lenses, they can’t wear contact lenses all the time or the entire place. Health of eyes is more important than one’s appearance.
Article Source:http://www.articlesbase.com/vision-articles/contact-lensesto-wear-or-not-to-wear-1558866.html
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Framed glasses which we are all familiar with have frames, inside which different kinds of lenses are put into. From the various materials of both frames and lenses as well as different functions of the glasses, we can also divide the glasses with frames into many different kinds. As for the eye contact lenses, just similar to glasses with frames, they could also be divided into a lot of kinds according to their different materials and functions. Anyway, no matter glasses with frames or contact lenses, what they have in common is that they can both be used as a decoration and as a useful tool that help us see things clearly, which means we could choose to wear the two kinds of lenses above according to our needs.
Usually speaking, for those who really have needs to wear glasses so as to have a normal sight, glasses and contact lenses can of course both help them. However, as a common sense that it is not healthy to wear contact lenses for a long time or when you are using your eyes too hard or too often. So in this case, when we have to spend quite a relatively long time in studying, reading or looking at the computer, we’d better choose to wear glasses with frames. And in cases such as going shopping or having a party or something alike, when you want to show your beautiful eyes, contact lenses might be a better choice.
Naturally, wearing a pair of glasses with frames, especially the one that fits you quite well, for some people, they may look prettier when having their glasses on. Glasses with frames could sometimes help you hide something unsatisfying about your eyes. Then for those who have attractive eyes, they probably would like to wear contact lenses as in this way, they can show their eyes out.
In all, glasses or contact lenses, the choice depends on you. Just think it over when you are going to make a choice.
Article Source:http://www.articlesbase.com/vision-articles/glasses-or-eye-contact-lenses-1558911.html
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The functional advantages of contact lenses over glasses can be felt in areas like sports, working in humid conditions and also in occupations where glasses can be very inconvenient and may not be compatible when using equipment like special headgear. Contact lenses also offer aesthetic advantages, as they do not alter the image of the person wearing it.
When contact lenses are worn correctly on the cornea of the eye, the vision is very similar to the natural vision. The objects are seen in the right size and position without any kind of distortion of the image. When glasses are worn, the distance between the glasses and the eye vary making the objects appear smaller or larger than the actual size, position etc.
Contact lenses are not altered by bodily movements, as in the case of sports or similar kind of activities. They remain stable providing stable and clear vision to the wearer. When glasses are worn, the vision is unstable while moving or running, in turn affecting the performance of the wearer.
Contact lenses provide a better and wider peripheral vision than the glasses. Contact lenses move with the movement of the eyes and the wearer always looks through the clearest part of the lens called the optic zone. When glasses are worn, it blocks the peripheral vision. When the eyes move to the sides, the sight is far from the optic center leading to distorted and blurred vision.
Contact lenses do not steam up due to body heat or perspiration. They also neither fog when exposed to cold weather nor get splattered in the rain. Glasses on the other hand fog up and the wearer cannot see completely during rain pour.
Contact lenses do not leave marks on the nose and are very comfortable to wear. No pressure is felt on the ears, temple, or nose unlike the glasses. Also glasses slide down from the nose during perspiration.
As told before, contact lenses do not alter the appearance of the person. They are boon for children who are often picked up at school for wearing glasses. Contact lenses provide both physical and psychological comfort to the wearer.
Also, after cataract operations, contact lenses provide the necessary protection more than the glasses. Contact lenses offer adequate correction when the visual acuity of the eyes are more than 2.5 diopters, which is not possible with the glasses.
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What most people might not realize is that there are several different types of laser vision corrective surgery. While most of the types of Lasik and other laser vision correction surgeries are similar, there are some slight differences that are important to note.
The first type of laser vision correction is PRK, or photorefractive keratectomy. PRK was the first type of laser vision correction, invented in the early 1980s. PRK works much the same way as Lasik, but improvement and recovery may take longer than Lasik. More discomfort may be experienced with PRK as, with this procedure, deeper layers of the cornea are exposed.
There is one major difference between Lasik and PRK. With Lasik, a flap is made at the front of the eye using a microkeratome that is put back in its place after the laser vision correction is finished. With PRK, the laser completely removes this outer layer of the cornea.
One of the other types of laser vision correction goes by a few different names. Custom Lasik, wavefront Lasik, and wavefront-guided Lasik are all the same method of taking Lasik technology a step further. With custom Lasik, a 3-D map is created showing how well an eye processes images and is used to guide the laser to repair any irregularities. This type of laser vision correction is said to produce an outcome of better vision with fewer risks than traditional Lasik.
Epi-Lasik is a type of laser vision correction that is just slightly different that traditional Lasik. Instead of using the thin blade of the microkeratome to create the flap at the front of the eye, a blunt plastic tool called an epithelial separator is used. The epithelial separator is used to displace the flap instead of using alcohol, which is used in some laser vision corrective surgeries and can kill epithelial cells.
Lasek is a type of laser vision correction that should not be confused with Lasik. Lasek differs from Lasik in that, instead of using a microkeratome to cut the flap at the front of the eye, a very fine blade called a trephine is used. After the flap is cut, an alcohol solution is applied to loosen the edges to allow for an easier flap removal.
A fifth type of laser vision correction is IntraLace Lasik. IntraLace Lasik is a blade-free method of laser vision corrective surgery. With traditional Lasik, a microkeratome is used to create a flap in the cornea, and then a cold beam laser is used to reshape the cornea to repair vision. With InraLace Lasik, two lasers are used to complete the procedure. A second laser is used to create the flap, instead of using a blade. The same type of laser used with traditional Lasik is then used to reshape the cornea.
There are several types of laser vision correction available today, with some new techniques that are still considered to be experimental. Different surgeons prefer some methods over others, and the best technique for the individual patient should be considered. Each type of laser vision correction has its own benefits and risks involved so care should be taken to choose the best one for a specific condition. Concerns and questions should be fully addressed during pre-surgical counseling to ensure the best decision is made.
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