Why not?
I also get lifetime corrections if my vision ever gets iffy in my later years.
I think she's concerned about future potential issues that corrections later on won't fix.
I'm doing my best to paraphrase what she has said, but make no doubt about it, I'm not any form of an expert here... I have an extremely strong astigmatism (sp?) and it's getting worse. My current glasses, I'm limited on frames I can get, because at the end of the sphere, I need that necessary thickness to get the focal periphery (sp?) vision to see anything out of the main focus of my vision and Lasik won't correct that. At one point, I tried contact lenses, but the things were so friggen thick, that they were a bitch to take in and out (they were almost like solid thick), and then I could only have them in for an hour or two because they deprived my eyeballs of oxygen.
In my most recent exam (because I couldn't see shit), it was also found that I will be needing bi-focals at some point in time. I'm fighting that one...
So I think it's just her seeing what has been happening with my eyes in terms of history and what's happening now. I think she's concerned about all this.
Trust me, I want it. I hate glasses. I want to see a clock at night without getting 5" from it. I want to wear any pair of sunglasses and not need prescription specific ones, etc, etc...