eyz
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great piece of information.
realised that you posted some info earlier, and you mentioned that you are gonna make an appt to see Dr.
Jerry Tan. So did you see him in the end?
so Epi-LASIK and LASEK do keep the epithelium flap right?
whereas the PRK and TransPRK remove the epithelium completely.
I thought the custom measurement of the cornea dimension is already available in the form of custom wavefront with LASIK surgery.
I think it should be available soon for TransPRK.
other than preference and protocol, I think the type of machines that is available to the doctor also plays an important part. cos if the clinic has only the older version of the amaris schwind 750, the doctor can't be marketing how good the 1050 is, likewise if their machine is unable to perform 2 procedure consecutively.
but come to think of it, eye correction surgery has come a long way, does the difference in the laser pulse of 750 and 1050 per sec makes any huge difference. and in the operating theatre where it's sterile, how much risk is eye exposed to during the switching of the equipment.
the only difference i can see that with the more advance in the technology, there is just a lesser hands on by the doctor himself. everything is automated.
realised that you posted some info earlier, and you mentioned that you are gonna make an appt to see Dr.
Jerry Tan. So did you see him in the end?
so Epi-LASIK and LASEK do keep the epithelium flap right?
whereas the PRK and TransPRK remove the epithelium completely.
I thought the custom measurement of the cornea dimension is already available in the form of custom wavefront with LASIK surgery.
I think it should be available soon for TransPRK.
other than preference and protocol, I think the type of machines that is available to the doctor also plays an important part. cos if the clinic has only the older version of the amaris schwind 750, the doctor can't be marketing how good the 1050 is, likewise if their machine is unable to perform 2 procedure consecutively.
but come to think of it, eye correction surgery has come a long way, does the difference in the laser pulse of 750 and 1050 per sec makes any huge difference. and in the operating theatre where it's sterile, how much risk is eye exposed to during the switching of the equipment.
the only difference i can see that with the more advance in the technology, there is just a lesser hands on by the doctor himself. everything is automated.
PRK is using the laser to ablate the cornea. However, there are many variants of removing the epithelium in PRK.
Epi-lasik is the mechanical means of separating the epithelium by using a epikeratome.
LASEK is to use alcohol to loosen the epithelium for separation. The typical procedure is to use put a well on the eye and pour a alcohol solution into the well for around 30s and use mechanical instruments to separate the epithelium.
Transepithelial PRK is to use a laser to ablate the epithelium .In the past, the technology was not so advanced so surgeons had to perform 2 steps. 1st step was to ablate the epithelium manually by observing the blue light disappearance under the laser. 2nd step was to ablate the cornea. There was a short transition time between these 2 steps, leaving the cornea exposed to the environment. Due to the above, this was not popular I believe thus in the past, it was epi-lasik or LASEK.
The latest technology is the TransPRK by Schwind Amaris. It has the monogram for ablating the epithelium better and it ablate the epithelium and cornea in a single step. It's model is based on the sample dimensions and thickness of the epithelium based on the general population. Apparently, the thickness and dimensions of the epithelium is pretty consistent among individuals.. It's not perfect but it is better than ablating manually as I described above.
I believe the future technology is that the machine can scan and detect and model the epithelium of an eye and ablate precisely. This is not available yet.
Different surgeons will have different protocols and procedures which they are comfortable with and their preferred machines. This is why every surgeon may give a different opinion.
As usual, caveat emptor.