Archive for the ‘Lasik & Vision Surgery’ category

Advanced Lasik with Wavefront system

November 14th, 2009

Wavefront system is the most advanced technique available today in Lasik surgery. It is a computer assisted mapping system which is first developed for use on adjusting the optics of the telescopes. Because almost every mirror that is made on earth has abnormalities, which is caused by the gravitiational pull of the earth existing all the time during the process of making mirrors. In order to get a clear picture of the outer space of solar system, the wavefront mapping system is developed to eliminate the effect of all abnormalities of the mirror.

After years of development in the field of astronomy, wavefront mapping system has become a tried technology, and introduced to Lasik surgery. It is now utilized on every type of eye laser surgery today, for instance, Lasik, PRK, LESIK, Epi-Lasik, and IntraLase.

Wavefront mapping system is used in two periods, before and during the Lasik surgery procedure. Before the Lasik surgery, wavefront mapping system is used to exam the eye condition, to judge if the patient is a suitable candidate for Lasik surgery. There is about 6% of the American people is not suitable to undergo a Lasik surgery. Because there maybe a high risk of getting side effect during the surgery due to the bad condition of the patient’s eye, or there is the possibility of not being corrected to 20/20 vision though Lasik surgery. If the patient is a suitable candidate, then the wavefront mapping system can calculate exactly how to reshape the eye for 20/20 vision.

After the initial exam, the wavefront mapping system will be used to guide the laser to reshape the exactly area of the corneal during the Lasik surgery. It makes the process more precise than the traditional ones. Although the wavefront mapping system can give the best possible result, it is important to know that not all patients will achieve 20/20 vision even use this advanced guiding system.

Laser Eye Procedures You Should Know

November 10th, 2009

Have you noticed that you can’t see the face three miles away clearly and cannot do everything when taking off your glasses? Sometimes, when you go for a party, none eyeglasses fit your clothes and it looks ugly on you. Maybe contact lens can deal with these problems, but you have to put them on in the morning and take them off at night. In addition, you can neither do exercise too hard nor have a small sleep duringf rest time. That embarrassing moment must bore you many times. In fact, you can have a laser eye operation to solve all the above troubles.

The laser eye operation helps to correct eye disorders like myopia, hyperopia, and astigmatism. Simple to say, the operation can be divided into two steps. First, make a thin flap in the corner to make sure the surgeon can see underneath clearly. Second, get rid of the redundant tissue which is under the corner. This step requires a well-designed laser, and it is how the operation’s name comes from. The consequence is that the cornea is well reshaped, so your sight can be back to normal.

The patients had better to know the procedure of the laser eye operation and the preparations before operations in case you are scared about it. In fact, it’s not complicated at all. When you know the details, you must be relaxed.

The preparation is quite simple. The surgeon will anesthetize the only eye with some drops, and then you will lose your feelings and fall asleep. The effect of drugs is not so strong that you may wake up during the operation, but it doesn’t matter.

Afterwards, you are put on your back on the operating table. Your eyes are kept open all the time with the help of a special device so that your eye lids will not be a barrier for the surgeon to cut away the flap on the cornea accurately.

The following step is the most important. First, a computer reads your eye sight problems. Second, you will be asked to stare at a certain object and the laser or a microkeratone gives off light down the flaps. A few seconds later, your cornea will be reshaped. At this time, you may feel some bad smell. Don’t be nervous. It comes from the burning eye’s tissue.

The operation lasts five minutes more or less. However, only one eye can be operated at a time. If you want to correct the other eye, you must wait for several times or do it the next week.

Even though you may feel comfort after operation, you still need someone to accompany with you to make sure you get home without accident.

Differences between LASEK and LASIK

November 4th, 2009

LASEK is short for Laser-Assisted Sub-Epithelial Keratectomy, and it is a type of laser vision surgery procedures. Similar with LASIK, LASEK intended to correct a person’s vision, reducing their dependency on eyeglasses or contact lenses by reshaping the anterior centrol cornea by an excimer laser.

LASEK procedure is very similar with LASIK. The operation also involves three steps. In the first step, the LASEK surgeon keeps the patient’s eye wide open during the laser vision surgery using a small instrument to secure the eyelids and creates a hinged corneal flap with a microkeratome blade or laser. Then the surgeon remodels the cornea underneath the flap with a laser as calculated before the laser vision surgery. In the last step of the laser vision surgery the flap is repositioned.

The only difference between the two laser vision surgeries is in the first step. LASEK only cut the outer layer of the cornea as flap when in LASIK a permanent flap is created in the deeper layers of the cornea.

Because the outer layer of the cornea, or epithelium, is a soft and rapidly regrowing layer in contact with the tear film, the out layer will quickly replace from limbal stem cells within a few days by itself after the laser vision surgery and will cause no loss of clarity. However, when the deeper layer is reshaped during the laser vision surgery such as LASIK, it remains the way with only limited healing. The cost of these two types of laser vision surgery is also about the same. For these reason, LASEK achieves more and more attentions all over the world.

Cataract surgery procedure

October 21st, 2009

Cataract surgery is the procedure of removing the cloudy lens of the eye. Cataract surgery replaces the natural lens with a synthetic lens to restore the lens’s transparency thus the normal vision is back. A synthetic lens of cataract surgery is more widely known as a permanent intraocular lens (IOL) implant. There are three types of Cataract surgery: Phacoemulsification (Phaco), conventional extracapsular cataract extraction (ECCE) and intracapsular cataract extraction (ICCE). The first kind of cataract surgery is performed in most cases.

Certain preparations should be made before a cataract surgery. Firstly, ophthalmologist should make sure that there are no associated pathologies, which may cause interference. The power of the IOL to be implanted should match the length of the eye and cornel curvature. So a prior measurement must be made before the cataract surgery.

During the cataract surgery process, the patient will be given eye drops to dilate the pupil and a sedative for relaxation. The doctor will cleanse the skin of your eye. Under a microscope, a small incision is made into the eye. The whole cataract surgery process consists of many steps: anaesthesia, eyeball exposure, eye entry, hydrodissection pie, IOL implantation, viscoelastic removal and wood sealing etc…

After the cataract surgery, a protective shield will be put over the eye. The cataract surgery may cause mild discomfort so that subsequent care should be taken. During the following few weeks after a cataract surgery, you should take eye drops prescribed by the surgeon several times everyday. Sunglasses are needed for protection from bright light.

Cataract surgery is safe and can achieve almost perfect outcomes. Less than 2% of the cataract surgery takers may have sight-threatening complications.