At age 7, I got in trouble for 'acting out' when they gave all the students a basic eye chart test. When it was my turn, they put me on the measured out line and asked me to read the chart.
I asked "What chart?" The teacher pointed at the door. Apparently the chart was on the door, but all I could see was a large white/greyish rectangle from that distance.
Yeah, my vision was that bad. You know that big capital E on the top of the chart? Yep, nothing, I literally couldn't see the chart. So I didn't know what else to do but keep asking "What chart?"
They called my dad in and between him, the teacher, and the principal, I got scolded for 'acting out'.
The next year, age 8, they assigned seats in order based off the first letter of our last names, which happened to put me in the back of the class. I couldn't see a damn thing on the chalkboard...
So my parents finally had to take me to a proper eye doctor. They found out my vision was like -4.5, which is extremely nearsighted.
So I finally got glasses, and about 2 weeks of apologies from my mom. Every time she apologized, I reminded her that she had absolutely nothing to apologize for, I was just thankful I could finally see!
I never got an apology from my dad, the teacher or the principal though. It's a bit fucked up that they could have caught it earlier on when the whole reason they gave students the basic eye test was literally to catch obvious vision problems early on..