A legally blind pole vaulter? Limits? Charlotte Brown doesn't know the meaning of the word

The sophomore from Emory Rains is a class 3A Texas state finalist in the pole vault. Entering the championship with a personal best of 11-6, Brown hoped to be in contention for a podium spot. Unfortunately, today was an off day and she only cleared 10-6 and finished eighth. It's not the results that's important, but her journey to the state meet. Brown's vision has deteriorated over the years and now she's legally blind. How does a blind student-athlete compete in such a technical event like the pole vault? It's Just Another Hurdle for Blind Athletes via the New York Times