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Home | procedures | refractive eye surgery
Your eye works by creating an image on a light- sensitive layer of cells called the retina. In a normal eye, the incoming light is first refracted, or bent, by the clear strong tissue at the front of your eye - the cornea. Inside your eye, a lens then focusses the light to create a sharp, clear image on the retina.
Myopia (shortsightedness) Myopia is the most common problem - it affects one person in four in the Western World. Patients can see close objects clearly, but more distant objects are blurred. This is caused by the eye focussing light in front of your retina rather than directly on to it.
Hyperopia (farsightedness) Hyperopic patients can see distant objects, but not those close at hand. It is caused by the eye focussing light behind the retina, rather than on to it. Young people may be hyperopic without realising it, because they have enough flexibility in their eye to compensate.
Astigmatism This is commonly found in conjunction with other problems, or by itself. In an astigmatic eye, the cornea is not perfectly round, so light entering the eye is distorted and not focussed to a point. There are refractive surgery available to correct your vision. MDA's experienced team will be able to discuss which is most suitable for your condition
PRK Photorefractive Kerectomy (PRK) uses an advanced pulsing laser to accurately remove layers of cells and so sculpt your cornea. Less than 10% of the corneal tissue is affected, and the laser is so precise that it can remove a single layer of cells without affecting neighbouring cells. The LASIK Procedure is performed in a comfortable operating table in the MDA clinic's custom built operating theatre.This surgical unit has been built to high standards. First your eye is numbed with a few drops of anaesthetic.
An eyelid holder is placed between the eyelids to prevent you from blinking, and hold your eye open.A suction ring, which is then placed on your eye, lifts and flattens the cornea, and helps stop your eye from moving. The feeling from the eyelid holder and suction ring is a bit like the pressure applied firmly on your eye. The suction ring, until it is removed, will make your vision dim or go black. The microkeratome, a precise automated surgical instrument, is attached to the ring. It moves across the cornea to create a hinged flap of paper - thin corneal tissue. The suction ring and microkeratome are removed, and the flap is lifted and folded back, then the laser, pre- programmed is centred above the eye. While you stare up at a small, bright light, the laser accurately sculpts the lower layers of corneal tissue - while it works you will hear a clicking sound. Afterwards the surgeon will replace the flap and smooth the edges.
Following your LASIK, you will be given three different eye-drops, free of chemical preservatives. The first is an antibiotic to prevent infection. The second is an anti-inflammatory drop to prevent inflammation and minor soreness and, finally the third contains an " artifical tear"supplement, which is used to provide additional lubrication for the surface of the eye.
Immediately after Surgery
Please use all three drops four times per day, for the first week,commencing when you arrive home.
Be careful when instilling the drops, not to touch the eye with the minim with your fingure.
You do not need to use the drops during the night or when you are asleep during the day.
You have been given an eye shield for use while sleeping to prevent accidental trauma or pressure on the eye from a hand or pillow, etc.
Please wear the shield on retiring each night for the first week following your LASIK procedure. It is important not to rub the eye that has been treated since it is possible to displace the flap.
If there is any suggestion of trauma to the eye that has been treated, then you need to be seen urgently.
Please call the clinic if there are any doubts.
Additional advice
Do not use eye make-up for the first week.
Aerobics, various sports, gymnasium, etc. can be commenced after one week.
Swimming and diving can be resumed after one month.
Contact sports where there may be direct blow to the eye, eg. boxing, karate, kick-boxing and perhaps rugby, can be resumed after three months.