What is Suction Loss?
What is Suction Loss?
In SMILE LASIK, the laser penetrates inside the cornea to separate and remove corneal tissue. For this to happen, the device must dock securely with the eye. The laser can only enter the cornea properly when firm suction keeps the eye and the device in close contact. If this fixation is lost during surgery, it is called suction loss.
Why is Suction Loss a Problem in SMILE LASIK?
If suction loss occurs, the laser settings used before the interruption must be reproduced exactly, which is a complicated process. Repeating the laser treatment risks overlapping with the previous laser spots, which can lead to unwanted corneal tissue patterns. These irregularities may affect vision.
Therefore, if suction loss occurs, the surgery must be stopped immediately. In many cases, SMILE cannot be continued once suction loss happens. To correct vision afterward, the patient usually has to wait until the cornea has stabilized over time, at which point LASEK may be performed instead.
Does SMILE Pro Eliminate the Risk of Suction Loss?
In standard SMILE surgery, the patient needs to keep their eye fixed for about 30 seconds. However, with the new SMILE Pro, the patient needs to keep their eye fixed only for about 7 to 8 seconds. This dramatically lowers the chances of suction loss and related complications.
Another important improvement is that suction must be centered on the visual axis for the patient to undergo surgery safely and stably. SMILE Pro includes a special feature for this: an automatic centration adjustment function called Central Lign, which ensures suction is applied in the most accurate position.
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