Espress0, on Sep 16 2008, 09:57 AM, said:
When I questioned why ASLA, they said that 2 years ago they would have suggested Lasik, but due to the shape of my cornea - not the thickness of the epithelium (eye covering) - Lasik is not suitable.
Different clinics will have different standards as to what constitutes a pre-op patient that may be at risk of post-op complications such as corneal ectasia/keretoconus. These standards may keep changing as technology develops, and they vary from surgeon to surgeon. It also depends on what equipment they have - eg. if they do lasik but do not have intralase (which can cut a flap very thin, precise shape and thickness) but can only do it with the blade they can't do the operation, whereas another clinic with intralase can do it easily and safely.
BTW the thickness of the epithelium does not matter, the thickness and shape of the cornea is what matters. Unlike the cornea, the epithelium does not provide the eye with any structural stability, and after ASLA or other surface procedures it grows back how it was. It is like the skins epithilium, if you get a light graze the top of the skin it grows back without scarring.
see:
Corneal topography
Knowledge of corneal topography essential for LASIK screening
Espress0, on Sep 16 2008, 09:57 AM, said:
The difference between the two tests? The Lasik clinic took about 15 mins and the tests were conducted by an unqualified practitioner. More of a sales rep. the ASLA suggestion came after 90 mins of testing from an optometrist and far moremodern equipment.
Due to the fact that the industry is entirely unregulated, such a difference is frightening. 
Yeah I found the same thing. Hence why I always tell people to go to a few clinics to get a feel for them and go for one you feel most comfortable. There are what I call 'chain' clinics, and other more independant clinics that are usually owned and operated locally by the surgeons themselves.
You will find the 'chain' clinic will eventually do a lot more tests, by the surgeon in the pre-op consultation on the day of the surgery. And if you just want them to just do the tests and have a chance to chat with the surgeon you will not get this consultation for free - I think I paid $50 - $100, which is 'refunded' if you go through with surgery. I also found they are less flexible and tend to want to do the same procedure on everyone. Eg. one surgeon I spoke to (that I didn't end up going to) does lasik with ultrathin intralase (100 micron flap) on 90% of his patients. If I were to choose that procedure I probably would have gone with him because he would be very experienced at it! The chain clinics get more patients through the door, hence are more profitable, hence usually can afford to have the latest whizz bang technology, glossy brochures, celebrity endorsements etc.