Anja couldn't see them with glasses either.
All I can say is, just be very very thorough in your research and do heaps of comparisons like Anja did. Only when you find a clinic that you feel assured of, then go ahead.
Being there with Anja through her experience made me appreciate and realise, how much I take my own eyesight for granted. BTW, I'm an artist, a painter, so my sight is important to me.