OP, I really wouldn't get hung up on the word, "astigmatism." It's just a
form of nearsightedness. In the end, nearsightedness is nearsightedness, and DD will see to the degree she does. If that makes sense.
The times "astigmatism" counts is when you have to pay for more expensive glasses & contacts because of it. Ouch! None of those cheap ads at Sears & Lenscrafters for $20 glasses. Although you CAN go to zennioptical.com and get an $8 pr of glassess, and they are great!
I have a mile astigmatism in my left eye and I am near-sighted. I correct for the astigmatism in my glasses, but not my contacts because I haven't found a really comfortable contact that corrects it, and they are a lot more expensive.
I don't really notice a difference.
Have you tried the toric lenses? Yes, they are much more expensive and somewhat better.
It's funny, my eyesight was so bad with contacts, when I would wear them, I would have to explain to people who were used to me wearing glasses, that I couldn't see.
If you trust your eye professional enough to get the prescription from him/her, you can also probably trust him/her to let you know when your child needs to wear the glasses and not. As a teen, my prescription wasn't strong. I was told to only wear the glasses when I had to see things far away (movie, chalkboard, etc) so that I didn't become "dependent" on the glasses.
Yes, that is true also for switching to bifocals. Once a person does, his eyes become dependant on the bifocals. My brother is an optometrist. He always said to avoid getting bifocals, but switch to different level of reading glasses if we need them, as we age.
I was at the top limit of age in getting Lasik surgery done for my eyes. And I had really bad nearsightedness/astigmatism. I did have problems after getting Lasik. Much of it due to aging and the eye muscles just not being as flexible with age. If I had had bifocals, I probably wouldn't have been able to get the Lasik done.