This means that she squints, holds reading material at arm's length and complains about fine print for months so as to avoid the latest horrible reminder that her life slipped through her fingers without her noticing it before Liz finally suggests that she take an eye exam. This also means not wearing them in public because she's vain and silly and not wearing them in private because, horror of horrors, she's been reminded in the worst possible way that she's the spitting image of the mother she sees as an old crone from a zillion years ago who's too oooooooold to live.
So much for maturity, right? We're dealing with someone who's sixteen and a bit acting like anything over twenty five is practically freaking dead and buried. We're also dealing with a five year old whose idea of empathy means that everyone thinks the way she does. What we aren't dealing with is an adult who can cope with the idea that kids might want to be able to see things clearly or someone who can be trusted to have an opinion that might help people.