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In technical collaboration with the Fyodorov Eye Microsurgery Institute,
Moscow, the Sangubashi Eye Clinic, Gotanda, Tokyo, has developed a Superficial
PRK ( Superficial Photo Refractive Keratectomy as Superficial PRK, corneal
abrasion is made only by a laser beam, and does not use any knife or surgical
instrument ) myopic refractive surgery using excimer laser. The Fyodorov
Institute has conducted more than 100,000 cases of PRK treatment since
1987.
In brief, Superficial PRK is myopic refractive surgery, by flattening the
convex curve at the center of the cornea through abrasion of an optical
zone of about 6.7 mm in diameter with an volume three demention excimer
laser. Due to using Superficial PRK we reached a high accuracy rate in
refractive effect more than 93% and make it to 100% by regenerative tissue
control after abration, It is highly safe and effective.
Depending on the degree of myopia and corneal thickness, the depth and
the area of abrasion differ for different patients. In cases of extreme
myopia and very thin cornea, Superficial PRK re-operation may be called
for. The following combinations may be considered in such cases:
(1) If the cornea is thin, RK (Radial Keratotomy) surgery would be done
first, to change the curvature, before going on to Superficial PRK treatment.
(2) Also AK (Astigmatic Keratotomy) refractive surgery first, if corneal
astigmatism is severe (2.50 D or more), and then Superficial PRK.
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| The Process of Superficial PRK |
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As described before this is a Picture showing the volume abrasion
of the cornea surface.
The large diameter of the volume Excimer laser gives a smooth corneal surface.
The patient only need to look at the light for about 30 seconds and its
finished. |
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This shows the post operative corneal surface which will recover within
a couple of days, under a protective contact lens. |
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This shows the flattened curvature of the cornea. |
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| The
Process of Lasik |
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First of all make a flap from the cornea by microkeratome. |
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After the flap is opened, the cornea is abrased by an tiny scanning Excimer laser.
The corneal flap is returned to it's original position.
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This shows the flattened curvature of the cornea. |
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Superficial-PRK VS LASIK, Video Presents 
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