盲公鏡 (maang4 gung1 geng2) — dark sunglasses (so called because of the dark glasses blind people wear) in Cantonese
maangˎ₄盲gungˉ¹公gengˊ²鏡简 盲公镜
Mandarin Pinyin: mang2 gong1 jing4
Meaning of 盲公鏡
noundark sunglasses (so called because of the dark glasses blind people wear)
nounDark glasses (referred to as 'Blind glasses' as typically used by the blind)