Because can be more risky than the original procedure, especially when small residual corrections, such as epithelial in growth, overcorrection or exacerbation of dry eye.
Considering that most outcomes today are very close to the intended result, a number of factors impact practitioner's decisions about whether to enhance, including patient's attitude after the procedure. That is why doctors try to make the patient understand that perfection is not always easy to achieve and is always accompanied by risk. Not to mention that in some cases doctors can not proceed with the enhancement because some Excimer lasers don't allow small correction treatments, which in this particular case the surgeon is limited by technology.
In a LASIK retouch well known as LASIK enhancement, the surgeon needs to lift the flap again in order to correct the overcorrection or undercorrection from the original surgery. Be aware that lifting the flap is not the only way to proceed with this procedure, in fact one of the most debated issue in LASIK enhancements is whether or not to re-lift the flap to perform.
This procedure, is very common for people who is over or under corrected with the Excimer Laser.
In above video we can see a surgeon performing the re-lift of the flap. In this case the procedure is performed without microkeratome or femtosecond laser, in other words these meical devices are not required in this procedure because the flap was already made in the original surgery, so in order to re-lift the flap the surgeon needs to do a different technique.
The hardness of lifting the flap for second time surgery, depend of the eye healing. This particular flap was re-lifted 8 months after the original procedure.
Page updated January 06, 2010