Green’s Dictionary of Slang

coke bottle glasses n.

also coke bottles, milk-bottle bottoms
[such glasses supposedly resemble the glass in a trad. Coca-Cola bottle]

(orig. US) spectacles with very thick lenses, used by those with seriously short sight.

[US]G. Cuomo Among Thieves 226: Looking at Mel through those great big milk-bottle bottoms that he wore [...] that made his eyes seem ready to pop out.
[US]S. King It (1987) 358: He’d probably have to go to the eye-doctor pretty soon [...] He really would be wearing Coke bottles on his eyes by the time he got to high school, he thought glumly.
[US]C. Hiaasen Strip Tease 5: Some skinny jerk-off with Coke-bottle glasses.
[US]‘Randy Everhard’ Tattoo of a Naked Lady 6: I can’t remember which one of them I saw first: the blonde come-on dressed like she had an exhibitionist streak a mile wide or the square in the coke bottle glasses who was eyeballing her like she was nothing but something to look at.
[US]C. Faust Choke Hold [ebook] [W]ith a surprisingly handsome face behind his smudgy cokebottle glasses.