Lasik Eye Surgery Definition

Categories About Lasik Eye SurgeryPosted on
Lasik Eye Surgery Definition
    1. How Is It Done
    2. The Parts and Structure of Eyes
    3. What Are The Eye Problems
    4. Why Are Eye Surgeries Done
    5. Kinds of Eye Surgeries
    6. The Cost Of Eye Surgeries

About Lasik Eye Surgery

It is an operation often preferred by patients who have eye problems. Patients who are checked up before the surgery can easily get back to their health in 10-15 minutes. It is possible to get rid of myopic, hypermyopic and astigmatic problems with the lasik eye surgery. On the other hand, this operation has a high success rate.

How Is It Done

Before the operation, patients are checked. Then patients get recommandations depending on the results. One of the recommandations is lasik eye surgery. We will talk about it. The patient is given a date and if he/she is using contact lenses, it is told to quit it and use glasses. On the day of the operation the transparent layer of the eyes is sedated with an eye drop. And the front layer of cornea is cut by Excimer Laser. This process isn’t painful for the patients. There is only a little bit of pressure felt on the eyes. After this, the fixing process begins. The patient is asked to look at the red spot and the cornea starts being shaped. There isn’t any problem if the patient misses the red spot. The operation is completed in a short amount of time. Patients are given protective glasses after the surgery. They must wear it for a day. Patients can go back to their normal lives in a day. Lasik surgery isn’t applied to people under 18 or over 65.

The Parts and Structure of Eyes

The eye is made of nerves and a structure to recieve lights. The sight is provided by those lights reaching the brain. The parts of the eye are stiff layer, vein layer and wire layer.

Stiff Layer

This part of the eye is the first layer and it protects the eye shape and prevents possible damages coming from outside. Cornea is also in the stiff layer. The other name given to cornea is transparent layer. The cut part by the Excimer Laser is in this layer.

Vein Layer

As you can guess it is made of veins. These veins carry materials to feed the eyes. The vein layer creates the colorful part of the eye called Iris. So the part that gives our eyes its color is in this layer. It also has the pupils. The pupils controls the amout of life by changing its size.

Wire Layer

The wire layer, also called retina , is in the inner part of our eye. The wire layer has the yellow spot, blind spot and sight nerves. The sight process is mostly done here. The recieved images falls upside down on the yellow spot. It reaches the blind spot and the brain from there. If the image falls directly on the blind spot, people cannot see. On the other hand, the image may fall on the right or left of the yellow spot. This creates eye problems.

What Are the Eye Problems?

Since our eyes are very complex, it is possible to gain or have natural eye problems. Some of these can be fixed but for some there still hasn’t been any discovered methods yet. Here are the main eye problems:

Lazy Eye

In lazy eye, one eye sees less than the other. Even though there may not be any problems in the eye, this can still occur and it is very common. It is possible to see this problem in every one person out of 100. It can either happen in one eye or two. Sight develops in the newborns and improves itself. This can occur while its still improving. Lazy eye is quite hard to fix. One of the things that make the fixing easier is when it’s discovered at an early age. Therefore infants must be taken to doctors and get checked up when they are 3-4 years old. Lazy eye can be caused by many things like old age, cataract etc. On the other hand it can be passed on with genes.

Cornea Diseases

Cornea is the transparent part of our eye. This structure prevents our eye from being damaged against dust and other things. It also breaks 75% of the lights coming in and prevents damage. It filters dangerous UV lights as well. Main cornea diseases:

Allergy: It’s one of the most common ones. By the effects of polen, dust or dry air there can be problems like itchiness, burning or stinging. People who use contact lenses encounter with it quite often. One of the other things that cause allergy is cosmetics products.

Cornea Infections: There can be over tearing and pain in the eyes caused by viruses. Cornea infections can leave scars in the eye.

Dry Eye: Tears protect the eye from outside while feeding the eye. It also heals the scars occuring in the eye. Dry eye can occur with people who spend too much time with computers. There can be a sight loss in further cases.

Ceratokonus: This disease occurs by the layer of cornea getting thinner and losing its shape entirely. It can be seen with people who have myopic and astigmatic disorders. As cornea gets thinner, the shape is displaced. It is more common with people between 20-40. It must definitely be fixed after 40. Otherwise it can cause severe problems with the eyes.


It is one of the most common eye problems. It usually naturally occurs in older ages. It can also happen with medicine and damages on the eyes. It can be defined as eye ocular getting blurry. Double sight, blurry colors, reading difficulties and blurry sight are the signs of cataract. An operation is necesarry to fix the problem.

Eye Tension

Eye tension, as it is also called Glokum, occurs secretly. Eye tension raises the pressure on the eyes and cause eye nerves to be damaged. It usually occurs to patients over 40 and shows signs like waking up with a headache, pain in the eyes while watching TV, seeing circles around lights and blurry visions. It happens more often with diseases like diabeties. It can also be caused by a damage from outside.

Infection in the Inner Eye

It is seen more often with people who have weak immune systems. It shows signs like bloody eyes, itchiness and pain in the  eye and blurry vision. It can occur in the different layers of the eye.

Far or Near Sight Problems

If the lights fall on the wrong sides of retina, sight problems occur. 4 different diseases are caterogized.

Myopic: In myopic disease, the image balls before the retina and it causes sight to be problemed. In myop, the eye is drawn outside. One of the other things that cause myop is the cornea breaking lights more than necesarry.

Hypermetropic: This problem is caused by the back of our eyes being longer than usual or cornea breaking the lights less than usual. People with this problem can see objects that are far away but have difficulties with near ones. Babies usually have this problem but it removes itself as we get older but it can reoccur in older ages.

Astigmat: It occurs when eye centers break the lights in different rates. People with astigmat can see blurry, shady or double.

Presbiyobi: It’s a disease that occurs in older ages. The eye collects the lights in the back and prevents  near sight. It starts in 30s and increases as the patient gets older.

Why Are Eye Surgeries Done?

Eye surgeries are preferred when there is no other way of fixing the eye problems. There are a lot of different surgeries to protect sight and fix problems. On the other hand people who don’t want to use glasses prefer eye surgeries.

How is it done?

It is necesarry to choose the method  and state the problem by check-ups.  And eye problems are fixed by laser lights.

Kinds of Eye Surgeries

With the developed technologies there are a lot of kinds of eye surgeries. It can be done openly as well as with laser lights.

Cataract Surgery

Cataract cannot be fixed with medicine or glasses therefore an operation is necasarry. There are two options. There are fako and multifakol techniques. In fako a local sedation is used with an eye drop. And the eye is cut 2-3 mm and fixed with lasers. There are no stichtes after. In a day or two all patients gain sight and go back to their normal lives. Multifakol is done with a very similar technique but is specially developed for patient who have myopic or hypermetropic problems as well.

Myopic Healing

People with this problem have a hard time seeing further objects. This diseases usually comes up in school ages and it’s genetic. Patients can gain clear sight with contact lenses or glasses. On the otherh hand, patients over 18 can get rid of it with laser surgery. In laser technique there is a small cut on the cornea and it’s shaped with laser lights.

Hypermetropic Healing

People with this problem have a hard time seeing near objects. It usually occurs in older ages and people can gain clear sight with contact lenses or glasses. If the diseases cannot be fixed with those it is necessary to have a lasik or PRK operation. After the surgery the patients are mostly healed and they gain their clear sight back.

Astigmatic Healing

This problem misshapes the cornea and cause lights to break in different rates. Therefore patients have problems like blurry or double vision. It can be fixed with contact lenses or glasses. It can also be permenantly fixed by a lasik or no touch technique.

Excimer Laser Surgery

This operation is applied to people who myopic, hypermetropic or astigmatic problems. People who want to have it and stop using other materials such as lenses prefer it. With excimer lasers myop  can be healed to -10 degrees, hypermetrop can be healed to +4 and astigmat can be healed to -6 degrees. Excimer fixes the rotation of lights falling onto cornea. It also reshapes cornea and give it a proper look.

Lasik Technique

Lasik is a further technology. With this techniqe there is no cut open on the epitel tissue. There is a little cut on the cornea and laser is applied there. After the operation it’s put back in its place. These are completely robotic operations and their success rate is very high. With these techniques pain can only be felt in the first 24 hours. It can easily dealt with painkillers.

Trans PRK Technique

This technique is the most advanced one. It is also known as no touch technique. The problems are fixed in a short time as a minute. The advantage of no touch is that it can be applied to both eyes at the same time. There can be some itchiness or stinging in the first 3 days but there is complete healing after it.

The Cost of Eye Surgeries

The cost depends on the doctor, the applied technique and the country it’s applied in. On the other hand the preferred stay in the hospital also effects the price.


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