Originally Posted By: bullwinkle
I think some of the early housings were glass, believe my bro's '87 Tercel has glass (aerodynamic) headlights. Civic needs a pickle jar for the other side so they match!
I'm not really sure you'd call 80's car early, but back then, there were either round or square headlights and either two bulbs or one single bulb. Just look to the Jeep. I think they still keep round headlights because that's the tradition. But yeah, back then it was all in one and one heavy piece of glass. Then they kept the same shape and went with plastic, they were much lighter, but tended to scratch. The trend continues today, each ounce they save, gets them slightly better gas mileage.