My daughter has been wearing glasses since she was three years old. She'd been complaining that the lights hurt her eyes at night after having been in daycare all day long--to the point where she'd start crying, they hurt so bad. I first took her to her pediatrician, who didn't think there was anything wrong and tried to say that because she has light-colored eyes (they're blue-green) that lights affect them more (huh?). I didn't believe her--I know my own kid, after all--and took her to see a Pediatrician Opthamologist--of which her doctor is only one of three in the entire city of Madison, WI. Not only was she found to be severely far-sighted, she also had Strabismus. For the Strabismus, we had to buy a special video program that she had to use everyday with some 3-D glasses. She hated it. But she hated the alternative even more--having to have surgery on her eyes to correct them.
Her Strabismus is, for the most part, corrected. Currently, we've seen an upswing in her far-sightedness--it's been slowly getting better. I'm crossing my fingers that she will "outgrow" it (apparently, you can outgrow far-sightedness but not near-sightedness). But if she doesn't, I wear glasses, so it's not like she's the only one to wear them. And wearing glasses isn't a disease. Thank God there is a way to correct sight so that she can see. And hopefully, like other posters noted, hopefully your daughter isn't "legally blind." Although I do believe that "legally blind" has a fairly wide definition, because I am considered on the threshold of "legally blind" with my near-sightedness, yet I can still fuzzily see without my glasses.
You aren't going to love your daughter any less if she wears glasses or not, nor are you going to love her any less if she's actually blind. Hang in there and wait until she sees the proper doctor who can accurately diagnose her (is she seeing a Pediatrician Opthamologist? They deal specifically with children, as they need to use prisms to look at their eyes; they don't use the big, scary machines that the adults use).
Good luck.