Types of Laser Vision Correction
Types of Laser Vision CorrectionAuthor: mohsinWhat 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.
Pages: [1] 2 3
The Miraculous Event of the Solar EclipseThe Miraculous Event of the Solar EclipseAuthor: Shawna RuppertSince man has walked the earth, he has wondered about the world around him. And nothing is more mysterious than the skies above. From the common occurrence of falling stars to the rarely seen eclipses, ancient man has tried to explain why it happened. At the beginning, eclipses were seen as a sign. The meaning of the sign depended on the interpreter. Eclipses have been connected to historical events and have been seen as a mysterious connection to war, births and UFOs. Ancient Mayan Priests, in 755 A.D., prophesied that a total eclipse would happen on July 11, 1991. And this eclipse would make two very life changing events take place on that date. |
What Volvo Owners Need to Know When Buying Used EnginesWhat Volvo Owners Need to Know When Buying Used EnginesAuthor: lowmileageenginesVolvo owners love their vehicles, and because of this, they take care of their Volvos. In fact, it’s not uncommon to find Volvos on the road that are 20 years old and in immaculate condition. While some head problems are apparent in some Volvo engines, by and large these engines are reliable. It is rare for engine failure to occur in a Volvo, but when it does, used engines offer a source of hope towards getting your vehicle back on the road and operating at 100 percent. There are some things you need to know in order to avoid getting ripped off. This article will share those with you, and help you go beyond merely not getting ripped off into finding excellent used engines. |