That's really well put. A rigid concept of a thing exists only in our minds, like so many things about reality. The question takes a different take when you consider that remaking yourself on the spot won't change what your life has been beforehand. You aren't editing a save file of a videogame where you actions affect where you end up: you're editing your current state, with the rest of your life stemming from it afterwards. You'll still retain the methods you've developed due to poor eyesight unless you choose to disregard it. In such a condition, would you remake yourself?“No person ever steps in the same river twice, for it's not the same river and they not the same person.”
In that case, yes I would. They would only serve to hold me back in that instance! I'd change my eyesight and make myself a smidgen taller because of vanity. Maybe make myself less temperamental, I'm working on not being so hot headed but to become more mindful and at ease in an instant would be pretty nice.
I can get Lasik - I've just had glasses since I was 3 and I'm so ... Glasses-y. I absolutely could do it. In fact when I was initially training to join the Police that was one of the missions I had. One day I may get it, but for now it's something that will cost me a lot of money without gaining me too much outside of freedom from spectacles.