Green’s Dictionary of Slang

(US campus) blurred vision that follows an excess of (beer) drinking; such vision has the added effect of making hitherto unexciting individuals appear sexually alluring.

[1952		B. Appel Plunder (2005) 319: He studied her through spectacles made of the clearest champagne.].
1987		Eble Campus Sl. Fall.
1989		P. Munro Sl. U. 34: After a few drinks Arnold had beer goggles and suddenly every girl at the bar was looking good.
1993		Lerner et al. Dict. of Today’s Words.
2002		h2g2 🌐 Beer goggles are the amazing pieces of ophthalmic equipment supplied free with all alcoholic beverages [...] They work in the following manner: The subject is suddenly gripped by passion and they begin to look ravenously about the drinking establishment in search of members of the opposite sex. [...] The problem with the goggles is that if they were removed, the object of their attentions would be less than desirous. The goggles intercept the input to the eye and by a top secret process known as beer-befuddling change it so that the target appears as to be the most handsome/beautiful specimen they have ever encountered.
2003		Observer Mag. 13 July 31/2: Never scout when you’re out drinking [...] because ‘You’ll get the beer goggles on and pull a minger’.
2007		L. Redhead Cherry Pie [ebook] Daisy must have really had her beer goggles on to invite me to a threesome.