Like others have said, there is no cure to nearsightedness, unless you want to consider LASIK a cure but even then, there is a chance that your vision will start to go after LASIK too, and you may need a future operation, or you may not even be a candidate in the first place. I never even knew I had a vision problem through many years of my teenage life because I never really needed to put my eyes through a lot. The first time I became aware of the problem was after I got my driver's license and had to get very close to the intersection before being able to make out the numbers and turn in time. When I picked up a friend, she told me that if I could not read the street signs until I was at a light, then I needed to get my eyes checked, regardless of what the DMV's eye exam had told me about my vision. She was persistent about it and said she was worried about me, so I took her advice. I was about 21 then, and both my father and sister needed glasses around this time. The vision test revealed I had myopia and since then, I have worn contacts, until earlier this year that I found a pair of glasses I really love, I splurged and now I wear those more than I wear my contacts, because they're just more comfortable (I suffer from chronic dry eye disease and photophobia, so contacts can start to bother me if I leave them on for more than 8-10 hours in a day and my eyes will get very red due to computer work and fluorescent light).
My daughter was found to have the other type of vision loss, presbyopia, at age 7. No one in our family had this until hitting late 40s/50s, so it was strange. Lots of kids in her classroom (I'd say 80% of them) wear glasses though, so she didn't feel uncomfortable about wearing hers at all. She actually likes wearing glasses because she says it makes her look smart and she says I look pretty with glasses and since she looks like me, she knows she also looks pretty in them. Lots of kids said they liked her choice of red frames (rather than the typical brown, black, or gold frames kids wear), so it really isn't a big deal at all! I have had some of her peers and some of the older kids come up and tell me they love my glasses and my daughter's and how well we pull them off, some have even said they think she looks cuter with glasses. Your child may actually grow to love wearing glasses and if not, there are always contacts. Please don't make it seem like it's a "loss", a "sad" thing, or a big deal that your child has myopia. Make it very matter-of-factly and let your child have an opportunity to choose a fun frame that suits him/her. The less negative you make eyeglasses seem, the less your child will think of it. Trust me, there are MUCH worse things in life that are worth being sad or worried about, like a child needing an organ transplant or dying from terminal cancer!