No need to test? Maybe you've been seeing blurry all your life but you've never noticed it because you get used to it.
Then suddenly you try on some glasses and it's one of those fake "color-blind guy tries on colorblind-glasses for the first time!!!!"-type video but then real.
EDIT hltv-version of you. I hate real-life autistic kids. But on the internet they're good for Jebaiting people