so my 12 year old daughter is legally blind (completely blind in one eye, some useable vision in the other) and I use the word blind for her sometimes because its a heck of a lot easier to say shes blind or legally blind than to stand there for 20 minutes and explain that no, glasses won't actually help her to every stranger I meet.
She can get around fine most of the time. She has enough vision that you might not notice right away that she's visually impaired, she runs around the house like any other 12 year old, but I find that when we are out and about, she's totally different with her cane and without it. Without it, she clings to my arm, or stops every time the ground changes to stick her toe out to make sure it's not a curb or a step up or down or a puddle (with no light perception in one eye, she has REALLY bad depth perception.) With her cane, she just moves so much more confidently. I think having a cane and learning how to use it are super important things, and if you just stick it in your backpack or whatnot, no one even needs to know you have it unless youre in a situation where you want to use it.
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As for your parents. That's a tough one. I have a lot of friends with different issues who use different mobility devices and a lot of times their parents have trouble accepting that they need them. I pushed for my daughter TO get a cane and instruction on how to use it, but for several years, my family wasn't okay with it. "I can just hold her hand" might work at 8, but not so much at 14. This year she went on vacation with her grandmother and I was VERY pleasantly surprised to see her cane in some of the pictures. I don't know how much effort they are willing to put into learning, but you could try showing them a video like
$1 to see if they'll start to understand how much a cane would help in high glare/uneven ground situations. Good luck!