Is it sad that this one took me a minute? 
I’m still trying to figure out the eye chart cartoon. Please help.
I didn’t think there was a deeper meaning - just all the silly laundry symbols that show up on tags…so if there’s more to it than that I’m also stumped… 
Sorry, I don’t understand.
There has to be more to it than that. I get that they are laundry symbols. Do men have trouble reading them? Is that a joke/meme?
If you’re happy and you know it…clamp your ham (my teen son helped)
The song is: "If you’re happy and you know it … clap your hands.”
The picture says: "clamp your ham.”
Pa dum pum (like a bad dad joke)
ETA: Cross posted with @islandmama1
Or is it that he’s wearing a tag-free shirt and you know how the symbols always wash off?
Even more confusing.
I’m sure there’s something else going on.
Calling @UnsentDementor for clarification.
I think it’s that nobody knows what those dang symbols mean yet they’re being used for an eye exam.
I agree; think it’s just meant to be whimsical - that no one can read those symbols.
OK. 
Haha—clamp you ham! Now I get it. Sorry, slow on the uptake tonight.
Me, too.