Man I have this same dilemma but with hearing. I wanna know what average hearing is like so I can judge how bad my ears are. I had a rude awakening a couple years ago when at work my coworker would say shit like "woah what was that noise?" about random bodily function noises my body would make that I thought were silent, like I felt them and didn't hear them (eg. Spit draining down my throat weird after a drink, the tiniest stomach gurgle or whatever)
Anyway that coworker gave me anxiety because I wondered how many times I farted silently into my chair but SHE PROBABLY HEARD. I hope my hearing is good and she's just some weird bat level ear haver
Sorry to take away from your question, I have shit eyes too so I can't help.