noun
round glasses with thick plastic rims
Named after the silent-film actor Harold Lloyd, who famously wore this style. Often associated with vintage or retro fashion.
彼はいつもロイド眼鏡をかけている。
He always wears round glasses with thick plastic rims.
あのロイド眼鏡、どこで買ったの？
Where did you buy those Harold Lloyd-style glasses?
丸眼鏡 is a general term for round glasses, while ロイド眼鏡 specifically refers to the thick-rimmed style popularized by Harold Lloyd.
From the name of American actor Harold Lloyd (ロイド), known for his round, thick-rimmed glasses, combined with 眼鏡 (めがね, 'glasses').