LasikInfo2u - Advantages Of Hard Contact Lenses

The notion of putting a corrective lens on the eye to achieve better vision is certainly nothing new. In fact, Leonardo da Vinci has developed this brilliant idea about 450 years. (Although there are no lenses were manufactured at that time, detailed drawings and descriptions were made.) AE Fick, a scientist in Zurich, has made the first contact lens in 1887 but quickly found that the human eye did not wear glass of reality. It took a major innovation in the years 1940, to produce the ancestors of contact lenses that we bring today: plastics. These lenses are made from a material called PMMA, which, in fact, was so well tolerated by the human eye that is still used for contact lenses difficult for intraocular implants goal and for orthopaedic.

Soft contact lenses were not available in this country until 1972, when Bausch and Lomb first introduced to the U.S. market. The original soft contact lenses tend to be more comfortable than the hard lenses available at the time, but because they were limited to a few sizes, these objectives have not many people. The big difference between hard and soft contact lenses was that the new soft contact lenses allowed to move oxygen through them - not only around the goal, as for contacts difficult. As a result, for a goal much healthier environment, because it allowed the eye "breathe" with a goal in place. The lack of oxygen to the cornea can lead to a loss of vision of the cornea and swelling epithelial cell damage. Since 1972, contact lenses have changed and has improved considerably. Now, lenses are designed to correct almost any vision problem and are available in models for extended wear, cosmetic changes (such as eye color), and availability.

The contact lenses to come an impressive variety of materials, sizes, shapes, thicknesses and colors. In general, they are divided into two broad categories: hard and soft. Hard contacts have evolved significantly since their introduction in the 1940's. Initially, improving their design and improved manufacturing techniques, but at the end of 1970 was a major step forward: the development of contacts that lasts "breathe" as soft contact lenses. We call these lenses rigid gas permeable contacts or RGPs.

The RGP lenses are more flexible and adapt better than the first hard lenses, and they last longer (compared to "wear") and sometimes better vision than soft lenses. They are manufactured by computer control towers that can create any type of surface necessary to correct the vision of someone. For example, if you have a high degree of astigmatism, an RGP lens can be ground with a curvature to match perfectly your cornea - to provide a healthier, more comfortable fit and a vision that is generally higher than offered by your glasses.

Another significant advantage to RGP lenses is that they can provide indeed, a new cornea for people with a problem of the cornea that distorts vision. Because this goal maintained his form on the eye - as opposed to molding itself to the eye, how a flexible lens does - it masks an irregularity cornea, can correct the optical surface, and improves vision

LasikInfo2u - Eye Glasses & Contact Lenses

Eye Glasses

For many, eyeglasses are fun. They are a way to enhance one's appearance and a relatively inexpensive way to express one's personality. If lost, they are generally replaceable. You can mix them up and change them to match your mood, your outfit and your budget. Many people buy eyeglasses frames with clear plastic lenses to spice up a jacket.

Naturally, there are people that do not feel wearing eyeglasses is of any benefit. Naturally, as you expect, there are of course, some cons to wearing glasses. Glasses for example, distort the form and size of objects you may look at. So, while you may "think" you are seeing clearly, you are only seeing through the limited frame of your glasses. Many people with glasses can't see beyond the periphery of the frames they select.

Eyeglasses can improve your appearance, but they might also detract from it or highlight a big nose. They can make your eyes appear larger than they are, so you come out with a raccoon like effect. Unless you pay for the right lenses, you may experience glare. This is one of the worst side effects of wearing eyeglasses. If you don't remember to take them off before a photo shoot, you will look like your eyes are nothing but bright white orbs!

Some frames are heavy, though you can buy lightweight frames. For those with thick lenses however, heavy frames may be the only option, gradually leaving a permanent imprint on the bridge of one's nose. Eyeglasses are also subject to wear and tear and do eventually need to be replaced. Think about how many times you sat on your glasses by mistake! If you haven't count yourself lucky, because sooner or later someone always does, even if you don't personally smash them.

Contact Lenses

The greatest advantage contact lenses have over glasses is they are convenient and allow the wearer to retain their natural appearance. That means you don't have to worry about looking bug eyed or getting headaches from wearing thick lenses.

They don't sit on the face, so if you have a large nose you don't have to worry about your eyeglasses enhancing your nose even more than usual. Contacts move with your eyes, so you can get away with wearing them without someone necessarily knowing you even need them. They can also be fun. You can now buy contacts in multiple colors, to change the color or shape of your eye. This is perhaps the greatest benefit for people that want to make wearing contacts fun and engaging. Think about it… you can be green eyed one day and blue the next!

Those wearing contacts however, are prone to infection. You are much more likely to get an infection from wearing contacts than you are from wearing glasses. You are probably less at risk for infection if you have LASIK too, depending on the type of LASIK surgery you elect.

Another problem with contacts is you have to care for your contacts religiously. If you don't you will either break them or irritate your eye, causing an infection! Some people find wearing contacts irritating. There are others that try as they might, just can't get the dang things in their eye, so what is a person supposed to do?

As you can see, there are pros and cons with everything. Some people will simply never be able to wear contacts because they find them irritating or they simply won't correct their vision enough to make purchasing them worthwhile. Which leads us to the next option; sizing up contacts and eyeglasses to LASIK. You know; laser eyes!