Automated Lamellar Keratoplasty, commonly abbreviated to ALK uses a device called a microkeratome to separate a thin layer of the cornea and create a flap. The flap is then folded back, and the microkeratome removes a thin disc of corneal stroma below. The thickness and diameter of this disc determines the change in refractive error. The surgeon then places the flap back into position. This procedure can correct large amounts of myopia and hyperopia. However, the resultant change is not as predictable as with other procedures.
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... At this point, the microkeratome is precisely readjusted to match the calculated cut depth for the patient's vision correction ... The calculation is based on the patient's glasses and contact lens prescriptions ...
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“Nature is a self-made machine, more perfectly automated than any automated machine. To create something in the image of nature is to create a machine, and it was by learning the inner working of nature that man became a builder of machines.”
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