MILAN — The progressive weakening of the U.S. dollar against the euro weighed on Safilo Group’s revenues last year. On Thursday at the end of trading in Milan where the Italian eyewear firm is publicly listed, Safilo reported a 1 percent decline in preliminary sales to 983.4 million euros. At constant exchange, sales were up 1.8 percent. More from WWD In the fourth quarter ended Dec. 31, sales were down 4.6 percent to 225 million euros. But at constant exchange, revenue inched up 0.4 percent. While ther ...